Just some things to know about selling on eBay:
eBay charges you 10% of your total price. Your total price is how much you sold the item for plus what you charged for shipping. Yes. eBay charges you 10% on what the shipping was.
Then, PayPal charges you 2.9%, plus 30 cents per transaction; again, on that total price.
While that may sound like a lot . . . there's no other single way to reach that many potential customers.