Hi,
I guess that belt tension induced wear on the bearings would be common to any belt applications. I guess that would include the edger and the reel mower. Although by this stage I'm not sure if they continued with either. Of course a 24 works a lot harder than either of those.
.Did they ever stand a PT upright?
Norm $80 would surely be towards the top of your budget. 24's are probably worth it I suppose but you would not want to have to do much to it to sell it again for a reasonable price .
All the best
Jeff