Aimsurplus.com has Anderson lowers for 39.99 I have one and its solid, great value at that price. PSA has blemishes lowers for 49.99, good deal too!
If you want more name brand I've seen spikes in the 70-80 range several times...
Thanks! Name brand doesn't mean too much to me as long as I like the engraving work. The only one I have found so far I don't care for out of the mainstream ones is DTI. I just don't care for the triangle logo.