Sounds like a decent deal to me, the R6 is a fairly rare machine, only made for one year. I have heard that its a good idea to replace the bottom end bearings but if the oil pressure is good, say around 50psi I wouldn't worry. Puts out about 220 hp. There are a number of good modifications that can be done to these machines, many have been described in detail on this forum. I own a N-6 but only have a pickup head and have had no experience in corn. Good luck with your purchase..