Wait until you get the check back, and then leave your negative feedback when all of the facts are assembled in front of you. If you get the check back, then it's just a matter of communicating in 80 charactes or less that he backed out of the deal at a point too late in the process and by doing so made you awfully nervous.
At a minimum, you should ask for a refund of your $12. Certainly, he owes you that much, and his reaction to this request should be considered in your feedback. To my way of thinking, it remains appropriate to insist he returns the money order. Although you are now protected by the stop order, remember that stop orders are not always followed by banks to which a stopped check is initially presented - and even a bank that issues a stop order (your bank) may honor the check by mistake. Do you want to go through a hassle with your bank if they were to make such a mistake?
Finally, if you don't get your check back, feel free to let loose with some choice explitives in your feeback!
At a minimum, you should ask for a refund of your $12. Certainly, he owes you that much, and his reaction to this request should be considered in your feedback. To my way of thinking, it remains appropriate to insist he returns the money order. Although you are now protected by the stop order, remember that stop orders are not always followed by banks to which a stopped check is initially presented - and even a bank that issues a stop order (your bank) may honor the check by mistake. Do you want to go through a hassle with your bank if they were to make such a mistake?
Finally, if you don't get your check back, feel free to let loose with some choice explitives in your feeback!