I’d spend the time and effort to go look at it and test it out before spending $30k.
Servicing can be expensive. HST Fluid is $300+, oil filters another $100+, air filters another $100, plus the cost of motor oil $50. You're looking at Approximately $600.
Tractors seem to be more expensive expensive in your neck of the woods, but there should be some room to negotiate on price.
Does it come with any optional accessories. Rear defogger, side defogger, rear wiper, mid PTO, etc.
I had bad tie rod ends on my L4740 so you might want any to check them out. Lift wheels off the ground using FEL and move wheel in and out. Easy fix but another $250 assuming you’re doing the work.