If you still like these kind of mags then this is a good deal. 
Of course if you like SS springs instead of the CS springs then it’s debatable.
No offense, but…I’d go with the NHMTG or D&H Teflon mags (which I own and use with great reliability) on that site, WAY before I’d ever consider CPods (which I DID own, and failed to perform reliably), any day of the week.
None taken! 
It’s good to know these things.
I agree 100%. After I threw 12 of those mags in the trash I vowed to never do it again.
Save a few more $$ and go with PMags, it’s all I use now and have never had a failure.
I never did hear/receive anything back from C-Products on the half-dozen mags I returned to them about a year ago because the sidewalls were too far apart at the rear when they were welded (allowing the follower to get out of whack). I ate the cost, chalked it up to experience and have avoided them ever since.
I’ve had new Colt, RRA, S&W and now DD ARs of some sort bouncing in and out of here in the last decade, and one thing I never really bothered to do until the last two years was to individually try all of magazines in each one; I got lazy and left some mags in the factory wrap or box because “they’ll all fit, right?”
After finding that some unused NHMTG 20-rounders would not latch in place on one of them without pounding it in with a mallet (not that I actually tried it, but reasonable force wasn’t doing the job), I realized that not sorting out what fit and what didn’t was just me making a lousy bet that my butt might not be able to cover. This surprised me, because from the time I began fooling with the AR platform back in the 1980’s, I had all the USGI type 20-rounders pegged as being good to go in everything. The old cat is still learning new tricks.
That may explain the price.
Better mags, and a better deal to boot.
http://dsgarms.com/index.cfm/product/175_174/grey-teflon-coated-30-round-magazine.cfm