Questions before I buy a NH BR740 or BR7060

Hey everyone. I am looking for a used baler. I have read pages and pages of stuff here but still have a few questions. I have found a br740 and a br7060. I looked at the br740 already and I'm going to look at the br7060 today. One thing I came across that I need to check is the sledge roller wear. Where is this roller located I have not found it on the schematics yet. Are there any other things I need to look for? Both appear to have not been used much only by small farmers in my area. Both or twine only and have the basic monitor. Not the bale command plus. The 7060 is about 6k higher at dealer and the 740 is from a private party. Any help will be appreciated. I should also add I am currently doing about 200 rolls a year but will be looking to increase that with the newer baler. Maybe get up to about 800-1000 max per year.

Questions before I buy a NH BR740 or BR7060