I played with a few in the past and my "Gottcha" email would read like this.
No worries, I have an airplane and will be in your area one day next week. Just bring the bike to the airport (The airport nearest the scammer's indicated location) I'll bring cash and if the bike is what you say, you can sign the title collect your cash and I'll bring the bike home.
The usual would be never to hear from them again, so sorry I sold it this morning or I must have a payment through ebay etc. I think most of these scammers are located in foreign country's.