but i have to go into the post office cause thats the combined price of shipping, an envelope, & shipping. also they have to weigh the book which adds to the price
You're not going to get nearly as many bids as you could thanks to that ridiculous shipping price. All of those books used are $1.50 - $4. The shipping doesn't justify this auction. The people on here are giving you good advice, and you're either lazily ignoring it or you're genuinely trying to rip people off.