I would like to see Amazon raise the barrier to entry to prevent fly-by-night sellers from listing the same crappy products. I give up sometimes when looking for something after seeing dozens or hundreds of pages of the same thing listed under different brands from different sellers.
Is there really so much benefit to having everyone and their uncle selling on Amazon? I can go to Ebay for that. As Amazon becomes no more trustworthy than Ebay I lost my incentive to shop there.