It drives me crazy when an item I've seen in a thrift store shows up on a website that is selling it for 10x the thrift store price. If I didn't already regret not purchasing it, I definitely do then. My goal is to make a way to buy and store all the cool stuff I see so I can resell it!
Red lamp at Deseret Industries in Provo, Utah: $5
Red lamp at Past Perfect in San Francisco: $(Not sure but more than $5, I bet)
Mid Century Modern 16" pendant light at DI (found on the same trip as red lamp): $7
Mid Century Modern 16" pendant light at Rejuvination: $215
images from Rejuvination and AtomIcindy