Yes, I also get stuff from
ebay. Been doing so since about '96.
Looking at a sellers feedback is obviously an important thing. I've said it here before but there have been sellers that had something I wanted, but their feedback was just sketchy enough - number of Negatives and Neutrals, and the type of negative, and the sellers response (if any).
In all that time (a couple thousand transactions) I have only been burned once. The seller just disappeared on me and several other people, and it wasn't coin related.
Coin-wise, I've only had a couple of coins that didn't stack up when received. The sellers pictures weren't the best and hid some "features" of the coin.
Other than that, I've added a ton of good stuff to my collection, both coin and currency, from
ebay. Really study the pictures and their description, and any other salient info like shipping, return policies, and so on.
ebay can be a safe place if you are diligent in protecting your OWN safety. Also, in the
ebay and other auction sites Forum of this site, there is a continuing list of sellers to avoid, and those to trust, based on input from the membership here.
Also, when someone posts a link to an auction with a question about it (coin, seller, grade, authenticity, good deal, etc.) there are plenty of members willing to give you their opinion of what you're considering. Can be extremely helpful in catching things of consideration that you may have overlooked.
There's a wealth of information here at your disposal. Don't hesitate to avail yourself of it!
Steve