I have a 2011 Grasshopper 729B 52" with around 200 hours. It has the 29hp Briggs Vanguard engine, I switched over to Mobile 1 synthetic after she broke 100hours. i laso have the mulch kit too. No problems other than a bent fender (which I will replace). I did have the powerfold option removed because it broke several times the first two weeks i owned it (not made to go up and down trailer gates). New this machine was $11,200, mulch kit $200, & the dozer blade ran me another $700. Asking $9800 for all. Warranty til April 2013.