I've seen assembled lowers going in the $230-250 range, but that includes a stock fire control group (trigger, hammer, springs and pins). Depending on what fire control group it has, it could be worth it. Rock River Arms 2-Stage run $120 by themselves. Gieselle and Timney are North of that.
I looked at Gunbroker and the cheapest one with an A2 stock was $259 with a seller putting a mess of them in at $309 (not a price point I would buy at with stock fire controls.)