We've had a couple of bad problems with Ebay sellers, BUT, we use Discover Card and they are pretty good dealing with bad deals. One they will investigate, and as Discover pay Paypal, if Paypal don't do anything, then Discover sticks Paypal the bill and reimburses us.
One seller sent us THREE of the same item ordered, they argued we'd ordered three, but order clearly stated one, they refused to authorize return so we got two for free.
Last order was for a Tek 2213 scope for parts $30 plus S/H, which wasn't much, scope arrived in record time IN PERFECT condition and fully working, seller even threw in a power cord for free. His ad stated not working for parts only. I'll buy again from that seller if he has anything I need.
There's always one bad apple, but many people are honest and just want to make a living.
I'm expecting two Ebay orders Monday, a Tek 2246 problem scope that will probably end up as a parts unit, for $112 it's worth it, tube and P/S worth more than that, and an old Heathkit I bought for sentimental reasons, I built that model in the early 70's, again going cheap.
I'll post on what state they are in after Monday.
Just as an addon, a couple of years back I bought seven for parts Tektronix scopes, they arrived well packaged and I stored them away until I had time to check them out. Three were 2465's. I brought one down to the office that was complete and labeled "NO POWER". Slipped a known working supply in it and voila!! worked perfectly, all four channels. The seven cost 200 bucks plus S/H. One was a 2215 and another 2246, both with defective P/S, once I get some time, I'll repair those. The 2465 has more than paid for that order.