I love to search through old thrift shops but I agree, Goodwill has become too profit focused as a whole, individual stores are plagued by thieves and cherry pickers which make it to where the good stuff never makes it out of the back rooms.
Speaking of ART. I left feedback on another review site because I did try to purchase a piece of so called 'art' from Good Will on Rivers near Ashley Phosphate.
It did not have a price on it, it was an actual oil painting, I am sure it was not valuable- but the colors were ok and I was interested. The cashier complimented it when it was in my cart- I said "oh- by the way, this doesn't have a price on it" she said she would take it and check, then 5 minutes later, I go to the register and ask for it, she said "oh- I thought you left, someone else bought it". Liars and thieves! I will never go in there again. Try Community Thrift Dorchester/Trolley or Rivers/526, much more honest, better prices, and you actually have a chance of finding the treasure you are looking for.