If you use USPS money order as payment and take that m.o. to your bank to cash it , you probably be told that they will process it for deposit only.
That may not be an issue for you , but it's good to know ahead of time.
PayPal is a definite no-go for me. I have always used bank money orders or cashiers' check. No problem.
Several posters have said that shipping hassle and expense aren't worth it for a relatively low level transaction ... If you have a buyer for your item and that buyer is willing to cover shipping , then SELL.