My lucky day maybe? I just bought a new in box G19 and wanted extra mags. The guy said he though maybe he had one in the back. He comes out and it is a hi-cap holds 15 rounds and was new in bag. Got the mag for - $50 good deal?
Definitely your lucky day, assuming glock factory. I paid $65 for a g17 new in bag mag at a gunshow about 4yrs ago, and I thought I had hit the lottery. I paid $90+ for a few 22 and 23 mags a couple of years ago. Great deal.