Yep, mags for the WA/Ino/G&P/AGM series at least are a reasonable price now.
Sounds like quality control is a little iffy on the AGMs, but functionality seems fine. I would also say wait a bit longer to see what the major problems (if any) are with the actual firing system.
So far, the major issue with WA based GBBRs is mag leakage, and bolt face/carrier/chamber/hop-up breakage. What I'm impressed with is that there doesn't seem to be many problems with the trigger/hammer/fire control system, which is the downfall of many a GBB and arguably the most difficult thing to repair.