I got a buyers one, regreted putting lime/fertilizer in it. I did flush it out with water, blew it out, and WD40'd it the last 2 times. Fertilizer and lime are quite conductive, the commutator and brushes get bridged with the chemical and DC electricty corrdes the bare metal spots quickly. Think the model was the ATVS100. Bought a tow behind drop spreader for lime and fertilizer for the ATV.
However, just grains, you'd be OK for a long time. You can get a spare motor for about 20-25 bucks, if you think you need one in case. Small seeds, the ones with a sngle opening will either pour them alot or be barely open and sproadic. Mixing small and large seeds, do about 1/4 to 1/3 of the hopper, then sitr it around. The small seeds will wander down to the bottom on the pile.
Spreading grains should be ok, it'll clog from time to time, maybe once a hopper full, might of been me not having it open enough. Spreading in tall stuff from upfront can be a handful. I have mowed grass high, then spread, then mowed it low. Rear spreading is best, but you need to keep an eye on it,