If you have to use money orders I recommend Western Union and always keep the receipt with the tracing number you can see if it has been cashed by yourself by using the numbers on that receipt, also they will stop payment if you can send in the original receipt and amount and they will issue you a new Money order in your name. I would pursue it never take no as an answer its your money and your merchandise. If you find out that it has been cashed but you have received nothing you can report that seller to Ebay! Good Luck.