Just bought 2 magazines off eBay and I'm thinking about getting 4 more while the seller still has them. Hope someone could attest to the quality of Checkmate 15-rd magazines. They are new old stock military surplus. Obviously, made for Berretta 92, but that mod is no biggie. The seller, who I have bought from before, assured me the "10 round mod" is not an issue. So, are these magazines worth $17 (shipping included)?