We didn't. I work for a dealership - not RV's - and I can tell you that our extended warranty plans are VERY profitable...for the dealership, not the customer. Price the warranty, put the money into a two year CD with an option (just in case we should ever get interest on savings again) or a good dividend paying stock. Chances are that you'll be ahead in the long run....all very much MHO.
Linda & Rick
2013 Entegra Aspire 42RBQ, 2014 G/C Summit
Lola, Dixie, Sammy & Ellis (small barking machines)