I did!
We had looked locally at new rvs, used rvs and from other individuals. I found the floorplan that I liked and went from there.
I found the rv on ebay, but it was located in RI, about 10 hrs from us. He had a "BUY IT NOW" price set, but I knew I couldn't get the money together before the end date, so I sent the seller. I told him to let me know if he did not sell it, I would be interested in purchase. We worked out all of the pertinent info through phone calls and email. DH and a friend of his took off on Friday evening after work, went part ways, spent the night and got there early Saturday afternoon. They looked at it and made sure it was what we wanted and what had been advertized, gave him a certified check from our bank (He had previously spoken with the bank) and DH took off pulling the trailer home. He deposited the check and when it cleared, he sent us the title for the trailer.
We saved over $8,000 off the cost of a new one and it was $3500 cheaper (including expenses) of a used one at a local dealer.
We both did lots of checking out of each other, so we knew this was not a scam on either of our parts. It worked for us.