Joella, I'm not sure what goes on under the heading 'Marathon Micromotor', or why the prices vary. The design of the control box also seems to change,but I don't think that affects the function. The optional foot control on some is a simple on off switch, or on others a variable speed control. On either they can be used without the foot pedal.
I bought mine as a spare, but like it so much, that I use it daily. However mine is no longer listed by Amazon, and was a lot cheaper. Remember you will possibly have to pay duty and certainly an administration fee to the carrier.
E bay have had some cheaper ones recently too. I cant' really advise you as I don't know whether they are different or all the same. However if you find one at £100 or so and is sold directly by Amazon or E Bay, you at least have some guarantee that they will be delivered.
Basically, they will polish with tools mounted on 2.35 mm shanks and screw mandrels, will fit standard burrs and and will drill with mounted drills on 2.35 mm shanks. Dennis.
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