Postal money order?

I had a member asked me to send him a postal money order instead of a check and I just went to the post office and gave them money and they gave me the postal money order plus a fee. I only buy from people I would trust and talk to you on the phone and just send them the money and tell them when they're all happy and cozy with the money to please send me my product when they can get a chance at their soonest convenience. But yeah you still want to cash it and be happy with the money and you're honest just sending their stuff when you have the money in your pocket.. my-2...