That sounds like the listing fee for selling a vehicle.
Did you try and sell a vehicle recently, but it did not sell? Then the listing fee for that is still payable, sale or no sale.
Same if you listed it in your local paper and the vehicle didn't sell, the paper would not refund you, your advertising fee.
You do have to pay that fee and do it soon, sounds like they've sent several reminders, and eBay do send debt collectors round, for unpaid fees.
@johtower_95