I'll add to DaveW's comment.
It depends on condition of the cooking grate and the kettle overall. It also depends on whether or not someone wants an old mothership Ranch compared to a newer one. There are a lot of features on a newer one that some people prefer over old.
Kind of like comparing an old black 26 Fleetwood to a newer 26.75 kettle. I traded a mid 70's "beater" Fleetwood to my buddy for his newer 26.75...haven't regretted it one bit. Not a fan of daisy wheels, love the lid bail and stainless grates? Yeah, sign me up.
I also sold my newer model Ranch btw, because I love cooking on the 26'ers so much more.