I have noted (perhaps its just me being stupid) that when these things are new they draw a certain amount of current, best I have seen being 83 mA worse 200+ mA, I was thinking maybe as brushes wear down then more current is drawn but I am not a motor man, but it seems a good way to check if there is some life in the motor or at least what life will be there.
This one is drawing 114mA which on my scale would see it having some hours of service left.
I generally sell these for about 50 pounds to 100 depending if i know the history and what current its drawing
14 day no quibble guarantee otherwise sold as seen
Dual listed and can be sold before I have a chance to remove them here.
Only have the one