This article provides information on both eBay selling limits and listing fees. 

Selling Limits
If you exceed your limit in a month, you should reduce the number of active listings you have on eBay to bring the number within your limit. Any listings that place you over your current limit may be automatically ended. Please reference eBay's help article regarding selling limits. 

Listing Fees
The insertion fee for fixed price format listings is $0.50. Please note that the insertion fee applies to each listing, regardless of item quantity in the listing. 

Related articles from eBay:

• Selling Limits
• Standard selling fees
• How fees work
• Find value fees for fixed price format listings