Agreed. I've been buying eBay and Craigslist lots, here and there, for the last couple of years. You always have to really scope out the pictures and read past the seller's own ignorance of what they have sometimes. It goes without saying, no-picture = no-buy. People can use "fake" pictures, but I haven't had a problem with that.
Honestly, the fuzzier and poorly staged the photo, the better I feel that it's legit (why fake with a "crappy" picture?).
More often than not, I end up buying a box of "mixed Star Trek metal miniatures". I've been around a long time, as have some of my online mini buddies, and we can usually suss out what's in a lot from even a pretty bad, fuzzy picture. Trains have "trainspotters", we have "mini-spotters".
Once I've established that there is enough in a lot that I want, I buy it, then sell/trade the stuff I don't need to the same buddies. The price has to be reasonable though. I've never spent more than $150, and that was for a huge lot of three dozen minis (including 4 that I wanted bad and can't get any other way).
I was on a mission to acquire enough old SL2200 lead 4-piece Klingon D-7's, to fill out my fleet and that's what always drove my buys. One would get me looking. Two would get me pixel-scanning the photo to confirm and possibly buy. Three (or more) and I was definitely in, once the picture passed muster.
It worked out well. I have somewhere in the neighborhood of eight classic D-7's now. My buddies have (or will soon have) old FASA stuff I don't want and duplicate ADB minis I don't need. I even ended up with Tholian, Hydran, and Lyran squadrons I never really intended to get into, but they came along for the ride.
The master for the Federation Old Heavy Cruiser is (slowly) being made using lead oCL hulls acquired in those same batches, along with one I've had since 1985.
One thing I've noticed in these purchases is the preponderance of Orion Salvage Cruisers. It makes no sense. It's supposedly a fairly rare ship, so most folks would really only need one. I have at least six now... and haven't found folks who want to trade for them.
