My suggestion is to sus out 2nd hand shops , and opportunity shops as we call them in Australia ,where families of deceased persons donate their belongings and bargain hunt shoppers can pick up goods for a fraction of the price you would pay at a retail shop.
And sometimes almost brand new .
I managed a senior Citizens OP shop a few years ago when somebody had donated a series of WT videos from a deceased relative but when i got back from a break of a few days a co-volunteer had binned them , he didnt like JW`s.
So that is a place where you might find some gems .