No Salesrank in Main Category
For some products Amazon does not display any salesrank within a main category on the respective product listing page. Currently Sellics cannot offer sales estimates based on salesranks in subcategories.
Example of a product showing a salesrank in a main product category (Pet Supplies)
If it only showed the ranking 137 in "Doors, Gates & Ramps", no sales will be estimated in Sellics.
No Salesrank indicates bad salesrank
If Amazon does not display a salesrank, it generally means the salesrank is rather low so that Amazon does not believe it would be helpful in persuading potential customers.