For some reason every time I go to buy a new toy it is far away!
I live in NC, have bought a boat in NY, a boat in Fla, a travel Trailer in SC and a motorhome in Florida.
My advice, make some decisions and choices ahead of time, rely very little on pictures, for several reasons, digital cameras and computers make anything look great, date taken can never be assured . Be prepared to travel, you do not want to make a long distance decision. I made 2 florida trips for boat and 2 1/2 for MH, and that was after having someone local check it out.
As mentioned above, get inspection. My MH ended up needing several new gas lines due to "critter" damage, insisted on roof inspection and reseal (Sellers cost) also negotiated oil changes on engine and genny. If you can accomplish inspection and purchase in one trip great. That only worked out on travel trailer for me, told them straight up, I am coming to see and if as presented will have bank check with me and plan to take home.
Tried that with MH, was 1/2 way there for P/U and purchase when owner called and told me had another gas leak and would take 5 days to get hose. Went down anyway and did "final" inspection, then owner agreed to meet me 1/2 way for pick up and final purchase. Did my transaction in MH in Wal-Mart parking lot.
Each transaction will go differently, no two the same, but be prepared to travel for a great deal. Looked at motorhomes from NY to Fla before I bought, if memory serves I believe we looked at about 15 all total.
and by the way, Fla issued a temp tag for MH that was good for 10 days, as I recall.