One of my more usefull purchases was my first sander, had to do a lot of work to that one before the second season with it.
New wear sheet in the floor, new apron chain and rebuild the the rear drive hoop (actually just made a new one).
When it was heading for major work again I could afford a new stainless steel unit.
Loading some coal ash into the new one, the sandpile is under the tarp.
The current setup, the old truck was just getting too unreliable
I get a tandem or triaxle load of salted sand every two-three years, time this year for a load