I've got quite a bit of things just laying around, shoot me a PM if you're looking for something specific.
Most of the swaps are fun to shop at, Ive been to most all of them around the state (Lansing, Ann Arbor, Detroit, GR, etc). Prices are generally cheap for common things, but can be as expensive for "big ticket" items as shopping online. You can probably find things cheaper locally - but you'll likely have to wait until someone near you has it. It comes down to a convenience factor, usually. The bigger swaps tend to have more variety, but its usually the same core group of vendors. If you havent gone, its worth going at least once, but unless you have a big wad of cash to blow, its likely not worth a five hour drive.