The best way I've found to search for NOS stuff on flea bay is by part number. If you know what it is. Sometimes, the seller knows what they have, sometimes, they just list it in a grab bag of parts or a lot or something, and there's been instances where you can pick up a lot of say, GM parts in a box, and find like a solenoid, or wiper motor, or some crap that you really need for dirt or somewhere close to it. Not always, but I've been lucky a few times. One time I bought a lot of GM PS hoses for weird applications, rando vent deflectors, and other sh*t that had a few G-body parts in it, and inside of that box that wasn't listed was 2 NOS radio antennae for a 69 Cutlass and a GM A/C belt for a 455 72 Cutlass. Sold the belt for $35 or $40 bucks or something like that. Bought the lot for $30. And still got a new radio antennae or two for my 69.