Let’s face it, a travel trailer or other RV could be one of the biggest investments you gonna ever make. So be careful when you select yours that you get the right one.
Yes, if buying a new one, please take the time to read and understand the warranty, what is the responsibility of the seller, and who pays in case of road failure.
Pay particular attention to warranty on "slide outs" if contained, and the appliances.
Second, don't take the word of any sales person regarding the capacity of the tow vehicle, get the information from the vehicle dealer and the people that install the hitches and tow packages, as the RV dealers will tell you most anything to make the sale.
If buying from a private owner, look very careful for any water damage, on ceilings, in closets and lower side walls, and check roof condition for possible repairs.