PSA has lowers instock or coming in soon.
I've been working on a build for a couple of months now. I know the actual "build" only takes a few hours (if that), but I have decided to make it a learning experience, and be as patient as I possibly can be in order to buy quality parts at the lowest price.
With that said, I've been really pleased with PSA. Wait a while until they release another batch of blemished lower receivers. The blemish on mine was literally just a tiny scratch on the inside of the mag well. They have really picky inspector, and sell the blems for $60.
They will usually do daily deals on random things, and every once in a while they do free shipping on top of it. Once I add a Magpul CTR stock, I will have finished my lower receiver for under $200.