6 AR mags for $72 or 10 for $110 ($11 each). These are Okay-manufactured gray 30-rounders marked "NHMTG", with free shipping over $50. I ordered and received the 10-pack, and also wasn't charged any sales tax. Manufacture date on the ones I received was 9-12. If you're into GI aluminum mags, this isn't a bad deal:
https://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_ID=2180
https://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_ID=2180