I don't think we've reached the over-saturation point yet.
I'm fairly lucky though (or maybe it's actually unlucky

). Many of the major auction houses don't handle cards in the condition I collect (think bottom-feeder

). If they do have one, it's one of the rarities like E107, T208, D359 etc....., that I can't afford. There's also a tendency for the auction houses to lot low-grade cards in groups, so that if a card comes up that I would be interested in, and could afford, it's grouped in a lot with other cards, to where I can't afford the lot anyway. More than once, I've seen a card like an N172 HOFer, E95 Cobb, Wagner or Plank, or an E90-1 Wagner that I would competitively bid on, but it's in a group of cards, making the lot unaffordable for me. So my participation in the major auctions is limited.
Steve