I don't buy pretty produce at the farmers market because I've suspected that a lot of it is just distributors for a long time. The out of season produce that looks picture perfect that isn't quite ripe, just screams large scale commercial grower.
Its the stalls with the ugly produce that I look at, as my own gardening experience, and that of an actual farmer attests. The best produce is the stuff the bugs want to eat. Cut the ugly part off, and what remains is the good stuff.
I also don't buy stuff that doesn't smell like actual food. Its pretty amazing how we have grown accustomed to produce that doesn't smell.