I really like ebay, I have bought and sold. My husband and I have gotten some really neat things off there. One of the most interesting was a actual civil war pic of his great-great grandfather. I got a $200 coat for $40..like new. All kinds of stuff.
You have to do your research, and it sounds like you are. You have to see if other people list the item you have, if it is selling and what for. You have to be sure that you list all your specifications in the ad..shipping, form of payment, when you expect contact, etc.
If you are buying, you need to read the listing and be sure you understand what is being auctioned....and if the seller undrestands what they are selling. Feedback rating is important...I don't think I'd buy from anyone rated below 98-97 %, and then I'd read and see why people left negative feedback. Also be sure you meet their payment criteria. there are a few sellers that only accept verified paypal accounts, nothing else. I like paypal and prefer to pay that way, then I don't have to waste my time going to the bank for money orders.
You can get stiffed...I bought some shirts I didn't get, filed a complaint with ebay and paypal. The person got shut down, but eventually sent them to me. That's why I try to be careful who I buy from.