this is the thing chairty shops are amazing places to spend hours getting lost in and yes they will always be hit and miss some are far better than others and all depeneds on the town or city or place
oxfam has its own book shop called oxfam books and music you can find some amazing books for very good prices but so many more chairty shops around and secend hand book shops.
if you have books you don’t want give them away to chairty shops they can always use them and someone will be thinkful for the books. on the most basic level somone eles can love the books you don’t want anymore and the money they make will help so many.
when looking for books look in the chairty shops in your town befor looking online or in waterstones
here is a vlog i made about this with all the info you need