Showing How Sure We Are
Ask a tool what something is worth and you get a number. It looks precise. Usually it isn't. A price is a guess built from other people's sales, and those sales are uneven, dated, and sometimes thin.
We'd rather show you how much to trust a number than make it look more certain than it is.
Every estimate carries three things
Each value in our app comes with a provenance line: a confidence level, where the number came from, and the date of the data behind it.
- Confidence is shown as a word and a three-step meter: high, medium, or low. The word is always visible, so the meter never has to carry the meaning alone.
- Source says whether the estimate came from an AI model's judgment, from data the owner supplied, or from both.
- Data date says how current the underlying information is. An estimate built on information from a year ago is not the same as one built on this month's.
A value shown without all three is a defect, not a style choice.
Why a range, not a single number
Values are shown as a range. A single figure invites you to act on a precision the data doesn't have. When two ranges overlap, the app says so plainly and doesn't declare a winner.
Low is the honest default
When we don't have licensed sales data to back a number, the estimate is labeled low confidence. That's intentional. Until the data is strong enough to support a higher label, we'd rather under-claim than mislead you into a purchase decision.
Confidence also doesn't hide weak parts behind strong ones. When a value is made of several components, the summary takes the lowest confidence among the parts that make up most of the value. One well-supported piece can't make the whole look certain.
What the estimate doesn't know
Every estimate includes a plain-language note on what it can't see: the condition of the item, and what buyers in your area will actually pay. Those two things move prices more than almost anything else, and no database captures them fully.
If you're about to spend money or time on an item, the confidence line is the first thing to read.
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