Please help me find reputable sellers to build sets!

Hi, I am looking to start grading some 70's & 80's sets (E.T., Raiders of the lost Ark, Empire Strikes Back, Good Times,Etc) and have not had much luck on Ebay. Many sellers over-grade their cards and the pics usually aren't helpful. Has anyone found reputable sellers that are fairly accurate when selling "Mint" sets?
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Arch has some nice cards and prices. Sometimes board members here are your best resource to purchase items. BTW, I also have a few different sets all opened from wax myself. PM me if interested.