Buying guides

These guides explain how to read the catalog. They do not invent prices, discounts, or product rankings.

Electronics
How to compare headphone deals
A buying guide for comparing headphone offers by observed price, seller feedback, shipping, and condition.
Laptops
A laptop deal checklist
What to check before treating a laptop listing as a deal: configuration, condition, shipping, and observed price history.
Electronics
How verified price drops work
Why some offers show a verified price drop and others do not, and which numbers come from observations.