A guide can help you decide which properties to investigate, but it leaves important questions unanswered. Before paying for reports or preparing to bid, establish what was quoted, when it changed and what evidence supports it. This guide covers a single residential property in NSW; collective advertisements for multiple units or lots have additional rules.
Start by separating the five numbers
| Number | What it represents | What to check |
|---|---|---|
| Advertised price guide | The selling-price indication shown to buyers. | Record the exact amount or range and its date. Do not assume it is an offer the seller must accept. |
| Estimated selling price | The agent’s reasonable estimate recorded in the selling agency agreement. | Ask which comparable sales and property features support the current indication. |
| Auction reserve | The seller’s minimum for the auction, set with the auctioneer. | It is usually undisclosed. A guide does not reveal it. |
| Recorded sale price | An amount recorded for a transaction that has already happened. | Check the property, contract date and differences before using it as evidence. |
| Your buying limit | The most you decide you can commit to this purchase. | Check finance, purchase costs and property-specific issues separately. Another person’s quote does not set your limit. |
The NSW auction guide explains the reserve and the point at which a sale occurs. A reserve, a guide and a past sale each answer a different question; none replaces a property-specific valuation where one is needed. For screening historical evidence, use our comparable-sales guide.
What the published NSW quoting guidance says
NSW Fair Trading’s seller guidance says an agent’s estimate must be reasonable, supported by evidence and revised when relevant circumstances change. If that estimate is a range, its upper end must be no more than 10% above its lower end. This is a rule about the estimate’s range, not a prediction of the final result.
For a made-up estimate of $1,000,000 to $1,100,000, the width is $100,000 ÷ $1,000,000 = 10%. That arithmetic does not establish that either endpoint is reasonable for a particular property, and it does not impose a $1,100,000 sale-price ceiling.
Fair Trading’s professional guidance says agents must not quote below their reasonable estimate recorded in the agency agreement. It also prohibits open-ended price wording such as “offers over” and a price followed by a plus sign. A higher eventual sale result alone does not tell you what the agent reasonably knew while marketing the property; assessing that difference requires the evidence and timing.
Does the guide have to equal the reserve?
No: they describe different things. However, that does not permit misleading price claims. Fair Trading’s example about a seller wanting more warns that quoting the estimate when a seller has said they will only sell for a higher amount may be misleading under Australian Consumer Law. Ask for clarification rather than treating any gap as automatically lawful or automatically proof of underquoting.
Keep upcoming rule changes separate from today’s guidance
Checked 3 October 2026: Fair Trading’s reform update, published 8 July 2026, still describes further price-advertising and Statement of Information requirements as expected towards the end of 2026, with a commencement date to be announced. It separately identifies changes that started on 29 June 2026. Do not assume every announced requirement is already operating; check the regulator’s latest update before relying on a particular obligation.
This article summarises the linked public guidance and is scheduled for an early review as those changes approach. It is general information, not a legal assessment of an individual campaign.
A price-guide worksheet you can copy
Use one row per dated quote or change. These are original record-keeping prompts, not a required government form. Keep your own notes separate from statements made by the selling agent.
| Record | Question to resolve |
|---|---|
| Property address and sale method | Am I discussing the same dwelling, lot and sale process in every conversation? |
| Exact guide, source and date | What did the advertisement, email or agent actually say, and on which day? |
| Earlier guide and change date | Has the indication changed since I shortlisted the property? |
| Evidence offered for the change | Which relevant sales, property facts or other information explain it? |
| What the seller will consider | Can the agent clarify whether the seller is considering offers around the quoted level? |
| Missing checks | What information do I still need from my lender, conveyancer or inspector? |
| Next decision and owner | Who will resolve the unanswered question before I spend more or make a commitment? |
A useful written request is: “Please confirm the current price guide and the date it was last reviewed. Which comparable sales support it? Has the indication changed since the inspection, and is the seller considering offers around that level?” The response may identify an unanswered question; it is not a guarantee of acceptance or an entitlement to the seller’s confidential agreement.
Worked example: a changed guide does not change your limit
Illustration only, using invented figures: you recorded a guide of $1,000,000–$1,050,000 on Monday. On Thursday the agent quotes $1,080,000–$1,100,000. Your worksheet should retain both dated entries and the explanation, rather than replacing the old figure and losing the history. The change by itself is not enough to decide whether the earlier guide was reasonable.
Separately, suppose you entered your own $1,050,000 ceiling in Baxau’s auction worksheet and chose a 5% buffer. The arithmetic is $1,050,000 × 0.95 = $997,500. It does not say what the property is worth, what you should bid or what the lender will approve. If the new guide is beyond your independently checked limits, the next step can be a clarification or removing the property from your shortlist; the guide is not a reason to automatically increase the ceiling.
The auction budget worksheet only performs your chosen arithmetic. Keep transfer duty and other purchase costs in a separate upfront cash calculation, and confirm actual amounts and finance with the relevant professionals.
What to keep if the quoted price seems inconsistent
- Save the advertisement URL, a dated copy of the price wording and any later changes for your own records.
- Keep the emails or messages in which a price was quoted; note the date and context of a verbal statement without presenting your note as a recording.
- Ask the selling agent to clarify the discrepancy in writing. Record their explanation alongside the original material.
- If you still have concerns, use the contact details on the linked NSW Fair Trading guidance. Provide the facts and dates; let the regulator assess the conduct rather than treating an above-guide result as a finding of wrongdoing.
When independent help can be useful
A buyer may want help checking the supporting sales, inspecting the property or handling negotiations. Specify those tasks when speaking with an independent buyers agent and ask what is included in the written agreement. The property research tool can help organise public-record questions; Baxau does not inspect, value or bid on your behalf.
If you want an introduction, send Baxau your Sydney buying brief. There is no charge to enquire and no obligation to engage an agent. Baxau may receive a referral fee negotiated case by case; read how introductions work.