Lots. Just this year: Opened "new" Makita power-tools where I can't be sure if the batteries are legitimate or knockoffs or old/refurbished ones in their place.

Lots. Just this year: Opened "new" Makita power-tools where I can't be sure if the batteries are legitimate or knockoffs or old/refurbished ones in their place. Cracked sink that is still pending return after two weeks. Counterfeit Whirlpool filters for my air filter. Floor oil that was opened, spilling a little, and shipped in a bag alongside its non-spilling counterparts. The only quality items I'm willing to order from Amazon now are small things like pens, and commodities. No more high tech stuff, no more camera equipment, etc.