It depends what you are looking for, wiring harness M&H are the best quality I have seen, seat covers and door panels Legendary is all I will use, Body panels and trim repops no one comes close to AMD accuracy and quality, Manual Transmission parts and rear end rebuilds I use Passon with good luck, PG makes some nice interior pieces that are hard to find oem in good condition.
What I would stay away from repopped would be side view mirrors, vent window frames, seat rails, and window regulators, all pieces I have not liked the quality or performance of repopped..
as far as price, classic, ebay, year one, mega parts, mcm, etc wait for coupons order as much as possible at once and just do the math..