My first few sales threads had "PayPal only" in them as I did not know how any other options would work and at the time would rather not have to deal with anything else. Then I had a couple buyers ask to use a USPS money order instead and after I decided it was worth a shot I realized that I was sort of restricting the options of certain people potentially wanting to pay me money. So, I just decided to write "PayPal preferred" and price every item as "$XXX Shipped" and assume the buyer will ask for any alternatives that may fit them better. Since then I've shipped a couple times overseas and even to an FPO, and accepted a couple more MOs as well, all requested by the buyers with compensations offered in case of inconvenience. Based on all my feedback it seems to have worked well for me to keep things simple and easy for the buyers and to keep an open mind for alternative ways to sell an item, the buyers with special requests seem to always be the nicest people so I have had no reasons to stop.