I have an old Hi-Boy 670 that I would like to sell and don't know what to ask.  I bought it new.  It is probably early 70's vintage in very good condition.  It has 9,000 miles which would be about 900 hours spraying @ 10 miles per hour, which is the speed I traveled.  It has a 40 foot boom and includes drops and banders.  Everything works and there has been no welding of the boom.  I added electric boom switches.  I'm not trying to sell it here.  I'll sell it somewhere else, but need to have an idea what they bring.

Edit:  The original post said it was a model 312.  That is incorrect.  It is a much later model 670, with Ford industrial engine and rear wheel drive.