@dman777 I have sold several high end items over the internet. My rules are as follows:
1. Open communication with buyer and move to phone and video chat, where they can see me and the equipment.
2. Have the buyer check me out on Audio Mart. 100% satisfaction rating. There needs to be a level of trust
3. I only accept payment as a direct bank to bank wire transfer. By this time the buyer will have seen the item ready for pick-up and will have been provided the shipping quote and details.
4. Nothing leaves my hands before full payment is in my account. Once a transfer has been made and deposited, it can't be clawed back.
I have never had an issue being paid and the buyer has never had an issue after purchase. Naturally I ship fully insured. Cheers.