G'day you are right D7E if the rollers need replacing then you are up for more than the machine is worth, however you must also look at the knife drive and knife condition over here (aus) knife sections are about $3.50 each and guards about $8 - $10 from memory bearings, pins, in the knife drive can get up to a couple of hundred$ and a replacement knife about $1200 these are last years prices and not too sure if i am right. We have one guy over here who still perserveres with his as he likes it to
cut his lucerne however after spending about 3.5k last year he has had a good run this year, and has done approx 300 acres with no dramas. Look at something in the flesh before you commit to buying and if it looks like good original condition then it is prob from a genuine seller if it is all painted up for sale then be wary a good coat of paint can hide a multitude of sins. As far as the rest of the gear goes stick with a NH or JD baler (personal preference to the NH lots of non genuine spares avail here) and most of all have fun doing it
Jon