What type of weapon? Where are you located? In my area the military surplus store has brand new 30 rnd for AR-15's, the sporting good store and the two guns shops all for under $20.00. Try Amazon, Cheaper than Dirt, Sportsman's, let us know what you find.
I`ve been searching for AR 15 and AK 47 magazines for the last week, and the best price I have been able to find for both was $6.99 plus shipping. I just ordered three Korean
AK 47 magazines for $6.99 each. Maybe as it gets closer to Christmas we can find some good deals on magazines and ammo.
Finally managed to get to the PSA in Greenville and got 6 30-rounders for 5.99 each. Exactly what I was looking for so it worked out. Didn't even have to fight the Black Friday rush. There was a little traffic but managed to be a fairly painless trip.