In 2000, I paid $7k CAD for a 15 yr old Kubota
B6200 hydro with loader and tiller and belly mower. When a Kubota or similar compact tractor shows up across Kijiji (what Canadians use instead of Craigslist) it is at least $10k, no matter how old it is. I know that $7k 22 yrs later has inflated to alot more than $10k.
All of that doesn't matter. I maintain the Kubota, repair whats broke or worn, and with the 50 hrs / year I put on it, it will last me the rest of my life. It does the yardwork just as well today as it did 22 years ago. No reason to expect it will not continue to do so. After I throw a rod and punch out the side of my engine block, the Kubota will still be running as good as the day I got it.
My next of kin will absorb/not-care about whatever "depreciation" or "inflation" hit. Since they derive their genetics from me, they will likely be feuding over who the hell knows what, and sell the Kubota for $500 and think they did well.
When it comes to equipment of any sort, do not "under-buy", that will cost you. The Kubota
B6200 is probably a bit "over kill" for my 1.5 acre postage stamp lot. I could have got by with some sort of Wal-mart brand ride-on tractor mower. Which I would have replaced at least three times in the past 22 years, at a cost of much more than $7k.