I recently bought a very used 1450 for $14k. It looked a lot like the unit on the govt site. The only saving was the drive train has only 2000 hours and runs great.
The undercarriage was completely shot and cost me $4k to fix. The wasted tracks cost $7.5k to fix. 1450s are notorious for having crap tracks. Sprite belts with Imp grousers. The wheel guides are worth gold. No one makes them and when they do you’re talking 128 at about $150 each. I was able to save most of mine and found a few used.
Even if you find a low hours unit, and the $35k to buy it, you’re getting 35 year old metal parts and rusty track bolts. Good luck trying to maintain them.
The only good news is they are great fun and you’ll learn a lot of semi useful information about outdated 80s technology. Cheers