Use a clear set of criteria before comparing listings: case dimensions, strap fit, movement information and photographs from several angles. Treat a price or grade label from the archived store as historical information.
Build a consistent comparison
Write down the reference, case description, dial, strap and movement label for each listing. Compare only like fields. For example, a case color tells you little about its construction if the material field is missing. Separate what the text says from what a photograph visibly shows.
Check which option the price describes
A product with multiple variants can have a broad headline range. The archived options table shows which amount went with which label when the archive captured those details. If the original record shows a range but the option list is missing, the lower price cannot be assigned to a specific variant.
Set aside unsupported details
Dimensions, movement names and water-resistance statements reflect the historic listing. A photograph cannot test water resistance or verify a movement. When comparing the records, mark a missing or unsupported specification as unknown.