I don't know if anyone has checked GB lately, but an oem +2 mag extender sold for $800+ last night! - i guess one could make the argument if you're trying to do a mod with all original factory parts etc. that the price is justified because there aren't that many around and that's what they go for...but when it comes to functionality, after market mag extenders work just as well right? I think i know the answer, but when i see something like that auction i just wanna make sure i'm not missing something