In order to get a good idea of the price and sales of a product, you may want to assess more than the current selling price.
Quite often you may find extreme values - where a price is unrealistically high (sometimes driven by amazon going out of stock) or a low price where a seller wants a quick sale.
A good time frame to view is 90 days.
If you are sourcing quickly and want a snapshot of an item, as well as referring to Keepa (Lesson D5), the AZ 90 day Chrome Extension will show you:
The Average Sales Price
The Average Sales Rank
The Category the product is listed in
I created this Chrome extension myself to speed up my own product sourcing efforts.
Install the AZ 90 Day Chrome extension here: