I am looking at older 36' coaches. I check NADA and I see there is a big difference in price between a 1998 and a 2000 m3600 U320.<br/>1998 Avg Retail $17,500. 2000 Avg Retail $68,050. Why is a 2 year newer coach worth more than more than 3 times as much?<br/>I appreciate any input.