[Will] Most dealers will allow you to buy at no penalty within the first year of ownership. If possible, try to wrangle a substantial price discount while negotiating your RV purchase. Do you NEED an extended warranty?? Ask Murphy. I didn't want one but bought one anyway 'cause a lot of my system warranties expired in one year....and these extended warranties sure don't cover a lot of systems. I bought DFS, which I hear (and hope!) is pretty good.
Read the fine print!!!! and call the vendor and ask some detailed, penetrating questions (and get his/her name). Have fun.