I own one, got the complete lower about 15mos ago for $115 shipped (IIRC) from a place in So Carolina. I use it with with a dedicated .22lr upper- fired about 100rnds through it this afternoon actually. It is very light and has held up fine after about 2000(?) rounds of .22LR and I'm glad I got it.... That being said there have been a number of reported failures on ar15.com- mostly 'the neck' breaking where the buffer tube screws in. As cheap as regular lowers are now days it's hard to justify unless you just want one and have realistic expectations, which was the case with me.
Here is a pic, obviously I painted it so you can't see much detail:
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