Well, fortunately, being a business owner, I have my own merchant account and can accept Visa/MC without issue.
In the auctions I post, which are few and far between, I only accept Visa/MC and tell them to call me within 2 business days of auction end to remit payment. I also state this in the payment instructions of the auction.
If they don't want to do that, 2 days later they get an unpaid item filed against them and I move on.
Ebay sucks... They're slowly driving it into the dirt, and I can't wait till it's over. Right now, the market is prime for someone else to step up and take over. I'd love to see Craigslist do it.