WebInterpret doesn't only select items that have the best sales history. Please check the following articles for more information about our selection process:
Why didn't you select items that meet all those criteria?
On eBay we check the last 30-day sales history. On Amazon we check the last 90-day sales history. If your item had poor sales for the last 30 or 90 days it won't be selected, even if the item in question had previously good sales results.