In most categories for most sellers:
$5.00 or 7.5% of reserve price, whichever is greater (maximum fee $250)
Charged whether or not your item sells
https://www.ebay.com/help/selling/fees-credits-invoices/selling-fees?id=4822#section5
Don't set a Reserve. Simply set your Starting Price at your true minimum you are willing and able to sell the item for (don't forget to calculate in fees including on s/h and sales tax that the buyer is likely to pay--either average or maximum across the states for that category). If you set a Reserve you pay the fee every time you list or relist it with a Reserve regardless of what happens with that listing (even ending it 2 seconds after it goes live) or the previous listing. That quickly eats into any profit you might otherwise make if you hadn't used it. The notion that setting the Starting Price low will result in a higher end price is questionable at best (many good bidders won't bid on listings with a Reserve) and the chances that any eventual end price hike would be more than the fee for that and prior listings is extremely low.
disneyshopper
