eBay Seller Limits
New eBay (Business) accounts are typically restricted by certain eBay Seller Limits.
The limits are placed on the total number of SKUs you can list in one month and/or on the total merchandise. For example 50 SKUs and up to $500.
FYI: It is created by the system once you connect the eBay channel in Shoppingfeed and it'll be sending the quantity of 1 for all products that are in stock in your storefront. So, instead of listing a higher quantity of one and the same product, you can list a variety of products with a smaller quantity.
NOTE: eBay will review your account every month and adjust your limits automatically based on your sales volume and the feedback you receive.
You can also Request a seller limit increase in your eBay Seller account.