I think this will better belong in trading discussions.
TBH, no. You have absolutely nothing to lose - you have his contacts, you know his address, you have all the cash and still all the hardware. The only person that can even result in a loss in this scenario is the buyer, since he is trusting you to ship the equipment to him once the money orders clear.
I'm not familiar about the money orders in your country. If anything goes wrong, tell him and let him sort it out. Worst case scenario you'll just hae to cut down on the units you are selling.
Moderators, please move the thread to where you feel it belongs.
My main concern about the money orders is how long they really take to clear. I've been trying to find out more information but find mixed answers. Some say it only takes a few days while others say it may take weeks or even months for a bank to find out that the money order is bad even if the money order seems legitimate initially.