Heres some pictures and prices for the 80 and 18-27 Olivers at Bartlesville,OK on Sat Oct 18th..It was pretty overcast at 8:30 AM and my camera didn't do a great job..
1-18-27 Oliver #109208 on round spokes $1,000
2-80 Standard $525
3-18-27 Oliver $550
4-18-27 on rear steel $325
5 thru 18 sold from $75 to $310 each..
The 86th 18-28 built sold for $250 on rear steel..I think the 18-28 on full steel only brought $175..
1-18-27 Oliver #109208 on round spokes $1,000
2-80 Standard $525
3-18-27 Oliver $550
4-18-27 on rear steel $325
5 thru 18 sold from $75 to $310 each..
The 86th 18-28 built sold for $250 on rear steel..I think the 18-28 on full steel only brought $175..