Work with about 80 guys at a factory in arkansas.Talked TO A freind about my AR15,He said he had some gi 20s in his attic since 1983.He brought them to work next day. USGI Colt 20s marked 223.Bought 3 mags in canvas GI pouch for 30 bucks.Mags were in great shape! Another guy dug around in his closet,found 5 USGI preban 30s,two with green followers.Bought all 5 for 50 bucks.Still another friend had 2 more USGI COLT 20s marked 223.Bought both for 10 each.A few more guys have GI mags somewere around thier house,and will sell them to me when they find them.So far Ive got 10 GI preban mags for a houndred bucks.A good cleaning,green followers and 2 coats of permaslic, and they are all like new!Talk to freinds and co workers,you never know who might have old mags setting around the garage or shop!Most ex military guys kept some mags they never use.