We purchased our coach from a private seller and are perfectly happy having done it that way. We also sold our fiver as a private seller.
Finding the coach we wanted (the DW had narrowed the selection down) was harder than the purchase. It only took 4 weeks to sell our Fifth wheel and the purchaser was happy too.
With the sales tools available on the net I wouldn't hesitate to sell myself. The only advantage to a dealer is arranging financing, but Good Sam will now finance private sales.
Good Luck and sorry to see you leaving our community.