Selling used vinyl on line is very tricky, particularly if it's not "Mint". I rarely do it because the only safe way to grade them is by playing them. Otherwise, you run the risk that someone won't like the way your visually-graded "very good" sounds on his deck and you have to start issuing refunds.
BTW, the common stuff you find at Goodwill are a dime a dozen and it's doubtful that anyone is going to buy this stuff from you on line, especially if they're beat up.