You'll send them a "scan of your credit card" !? I hope not by email...
Yeah, I had to do a similar thing the first time I ordered from Freestyle, and KEH for that matter. They wanted a copy of my card faxed, had no end of trouble getting the fax to them though, so I just scanned the card, blocked out some pertinent details (ie, last half of the number and the expiry) and emailed it. No drama's at all, but I was a little hesitant at first.
My goal in life, is to be as good a person as my dog already thinks I am.