OldJoe-Be sure to check on the details specific to the states/jurisdictions you are driving to and from.
Beware of the many different hoops you will need to jump through, and how each one affects the next take-off and landing. In my limited experience, and extensive reading of insurance/titles/registration/licensing, it appears that the biggest PITA happens when the pick-up location is in another state with different practices from your home state. Be sure to know what you are getting into before you place that winning bid.
Some things to consider:
titles;
RV re-titling can make finding insurance difficult, as home-conversions are frequently denied by underwriting. Many folks end up with "commercial for personal use" insurance, which AFAIK, is not applicable to an RV title. It seems like those who have had the least problems, avoid using the word "bus" whenever possible.
inspections/VIN verifications-what are your options if you need a VIN verification or a safety inspection in your home state to get your tags/title/insurance, but they don't do that in the state you are purchasing from or vice versa? (saw this one in the forums somewhere)
temp tags- need info from the vehicle, and the vehicle is not near the tag office. um... what now?
GWWR over 26,000 seems to be more problematic in a lot of ways, at least until you manage to get an RV title (where you don't need the CDL), but then you have to deal with the insurance hoops...
insurance coverage - this seems to vary a great deal between jurisdictions, as do all of these points. Be sure to mention your location(s) when asking questions in the forums. It makes a lot of difference in the final answer.
And, if the seller will deliver? I say throw some extra money their way (within reason anyway) IMHO, paying them to deliver would be cheaper than all the expenses and hassles of traveling long distances and all the other head-aches, no? It sure can't hurt to ask. What's the worst that can happen? They say "no way!" and there's no harm/no foul.
Good luck!