1963 933 track loader craigslist KS

I saw this ad on Craigslist. It's close to me and I thought about going and looking at it. It says there is oil in the radiator. What could this be? Could it be a blown head gasket? Do they have oil coolers on the 933s? Could it be leaking oil cooler? Also what are these bringing? It says make offer or for trade. I'd like to know a round number before I went to look at it to even know if I could afford it. Thanks for the help! Link is below...


https://ksu.craigslist.org/grd/5670737788.html

The track pads don't look bad, plus there seems to be adjustment left which means the undercarriage maybe in good shape?
That is typically considered the expensive part.