It is hard to say. I bought my 105 diesel corn special with a hiniker bin ext, QT variable speed feederhouse, excellent condition, one owner machine a year ago. I paid $1000. My machine was completely went through in the last 3 years with all belts, augers, bearings, inside sheet metal, tires, cylinder bars, concave, canopies, drag chain, and a few more things. All I can tell you is that it is a corn shelling machine. I can get $2500 out of the 404 engine alone. I figured I did not get hurt. I seen two 55's and a 105 sell at a sale last winter. They where average condition. They all had the big gas engine (303). They all had old style grain heads_feederhouse. They all run and worked. The 55's brought $5 a piece. The 105 brought $25. The scrap guy bought them. They could not get a bid on them.