Since the top inventory value we can get is 999, we don’t have a way to have an accurate units sold value when the inventory is equal or greater than 999. This is why, when dealing when 999 inventory values in a listing (either in the inventory column or anything related to units sold), we display the “+” icon next to the value. Even though we guess there are more than 999 items on the inventory, for all calculations we use just the 999 items that we know about.

Alexa Rank shows seller popularity. It ranks thousands of sellers based on their average number of pageviews over the past 3 months. The lower the Alexa Rank, or closest to 1st place, the more popular that website is. This is useful because these may be sites you want to target first since they have the most visibility.

(This number is generated by adding a big quantity of product to the shopping cart, Amazon will then let you know how much you can actually purchase from that seller at that given point in time.

Gives you visibility if the seller is full filling the order or if its in Amazon’s warehouse

One product can have multiple ASINs due to multiple Amazon sellers selling the product through different listings.

One product can have multiple ASINs due to multiple Amazon sellers selling the product through different listings.

If inventory numbers for a particular product changes between crawls we take all of the inventory changes for a particular product/seller and add them all up.