Anybody ever tried these? Says they are Alnico V, 8.5K resistance. I see a lot of posts for Artec preamps, but not pickups. Just wondering if these might be a poor man's vintage pickup, maybe for a backup, frankenbass, or even a main player? http://www.ebay.com/itm/Artec-Alnic...936?pt=Guitar_Accessories&hash=item257c1b9b30 They're $30, w/shipping, so for me at least, that's not a gamble I want to take, so that's why I'm asking if anybody's tried these. My first thought is you don't get something for nothing, but it's been known to happen!