Thanks all for the advice. I guess I'll try PayPal and see what happens.
I've exchanged several emails with the buyer and I trust him. I'll need to get an address and phone number and do a little bit of verification.
The XD3 is essentially going for $1000 (with the hard case). It's less than a year old and in fine shape. I'm selling it as a package with my reedless accordion, however.
Thanks again for the help.
Tommy