A dealer in my area is selling a used green simplicity 21hp Vanguard, 48" fab. deck for $3500 with 220 hours (approx 2-3 years old). Talking to him about it, he said that the older green Simplicity's are acutally Ferris machines with the Simplicity name on it. Can anyone validate this statement? Also, if they are different than the Ferris models, what exactly is different? Finally, is $3500 a good price for this machine. Thank you!