Pros: sales, collection of funds via paypal, small income stream.
Cons: con artists, scam, false claims, no seller's protection, fees.
There are many whom would claim bad product; just to keep items for free, or exchange the same product for their bad one, then claim the item you sold them was bad. eBay many times goes with the Buyer's Protection to satisfied buyer. But does not give you the opportunity to rebuttal the issue. (Example: Sold a Cellphone, later to have it return for – more... bad description, when serial numbers were checked; the serial numbers were completely different. Customer had the same device, and sent back his damaged device, instead of the one sold to him.) This is referred as a scam which eBay refuses to see, after a sale is complete, and you state "there are no refunds or return for item purchased. There is Seller's Protection, but, it does the little people no good. It's a catch 22 in many ways. Otherwise it's a total mobile business, whereas where ever you go, it comes with you. – less