re: Where is the best deal on AR-15 uppers?

So far I have a mil spec CAR buffer tube, Magpul MOE fore grip and CTR sock and magpul pistol grip all in OD Green got these a few weeks ago from Cheaper than dirt. Yesterday I ordered a castle nut, end plate, buffer spring, buffer, accu wedge, lower parts kit, castle nut wrench and front site tool from Del-ton. I plan on ordering an essential arms lower either tomorrow or next week. Hopefully in a month or two I will order a complete upper half. Shooting for a $700-750 total build price. I plan on using a Magpul flip up rear sight as well.