The first thing to understand about a used-item price is that it is not a measurement of anything. It is a position taken by a person, for a reason, and the reason is usually visible if you look at the listing rather than at the number.
There are four common reasons and they behave completely differently. The first is anchoring: the seller looked up a book value, added a margin for negotiation, and is expecting you to work them down. That price will move, predictably, and everybody in the transaction knows it. The second is need: the seller has a deadline — a move, a divorce, a new vehicle already bought, a storage bill running. That price will move a lot, quickly, and it moves for time rather than for argument. The third is ignorance: the seller has no idea what the thing is worth and picked a number from a memory or a neighbour. That price can be far above or far below the market, and the ones far below are the reason people keep checking listings at seven in the morning. The fourth is a dealer's cost-plus: the price is what they paid at auction plus reconditioning plus a required margin, and below a certain figure they simply will not go, no matter how well you negotiate, because the deal stops being worth doing.
You can usually tell which one you are looking at within a minute. A listing with fourteen good photographs, a written service history and a firm price is anchoring or cost-plus. A listing with four photographs taken at dusk, a one-line description and the word 'today' in it is need. A listing that describes the item lovingly and gets a basic fact wrong — the wrong engine, the wrong year, the wrong capacity — is ignorance, and it is worth a phone call either way.
Underneath all four sits the actual market, which you can observe and they often have not. The market is not what things are listed at; it is what things have sold for, which is a different and much smaller number. Completed-sale data is available for most categories if you go looking: the sold filter on the auction sites, the wholesale auction reports, the dealer trade-in guides, and — for vehicles specifically — the difference between the private-party figure and the trade-in figure, which is the width of the whole negotiation. Anybody quoting you a retail figure as though it were a value is quoting the top of a range whose bottom is thirty per cent lower.
The second force is condition, and it matters less than people expect at the top of the range and more than people expect at the bottom. Two examples of the same model with the same mileage can be a thousand dollars apart on cosmetics and four thousand apart on a service record. What the market pays for is not shine; it is evidence — a folder of receipts, a documented major service done at the right interval, a second key, an owner who can answer questions about the machine without checking. Evidence is the cheapest value a seller can add and the most reliable discount a buyer can find, because most sellers have none.
The third force is time of year, which is real and larger than most buyers believe. Convertibles are dearest in spring. Four-wheel drive is dearest at the first snow. Mowers are cheap in October, generators are impossible to buy the week after a storm and cheap in March, boats are cheap the month the season ends. If you can move your purchase by three months you can often move the price by ten to fifteen per cent without saying a word to anybody.
The fourth force is the cost of the transaction itself, and it is where the naive buyer loses the money they saved. Sales tax, title and registration, transport, an inspection, immediate deferred maintenance, and — for a vehicle — the difference in insurance. A car bought private-party for eight hundred less than the dealer's, that needs tyres and a timing service and costs more to insure, was not cheaper. This is why every worksheet in this course computes an all-in number rather than a purchase price.
The worksheet for this module is the comparables sheet. Five completed sales, not five listings, with the source and date of each, the condition notes that explain the spread, and the resulting range with your own target inside it. Fill it in before you contact a single seller, because the sheet is what lets you tell a bargain from a trap in the twenty minutes you will actually have.