Here's how the story ends...
Spoke to the seller this morning and told him I was interested in the Stargate and not the Star Trek. He told me no problem and that he actually had two Stargates that I could choose from. So I went to the bank for cash, loaded the van up with some tools and stuff, then drove an hour to this guy's storage locker. The seller, for his part, lives in the city and had to reserve one of those ride-share cars to drive out and meet me. When I arrive, he opens the gate and we follow to one of his two lockers. Out in front is the Star Trek. In the locker there's about 10 pins, all stored vertical on their backs and wrapped in clear plastic. The second locker has about another 10 pins. Most looked to be in good shape. And he's got some real good machines, LOTR, Demolition Man, The Shadow, etc. BUT, he does not have two Stargates... nor does he have one Stargate. He has exactly zero Stargates. He tells me that he must have sold them in the past and forgot. Grrrrr. I ask if he would sell any of the others and he's willing, but not for anywhere close to what I want to spend. So we shake hands and I head home. Waste of three hours on my Saturday afternoon and about $20 in gas and tolls. Bummer.