Gear motor?

Question

Do it yourself

Good day.
Dear Khabrovites, I know that many of you work quite closely with electronics and, in particular, with electric motors.
You need a motor with a gearbox (it can be together, it can be separate) with approximately the following characteristics:

1. 3-12V the closer to 3V the better. there will be LEDs in the craft, I would like to get rid of additional stabilizers and so on ...
   
2. 6-12RPM. It will be necessary to slowly turn the axis, on which there will be approximately 100-200 grams.
   
3. it is desirable, but not necessary, the presence of a wheel under the belt (and not gears) at the output for transmission to the axle.
   

Of course, the cheapest options are of interest.
Found in the open spaces dx.com:
dx.com//p/111323
Nice thing, but 12V and a little expensive. Although if I can’t find a better one, then I’ll stop at it.
Advise, please, something suitable.
PS: I was looking for dx, buyincoins, hobbyking. Did you search badly?
Thank you.

Answer 1

Please www.pololu.com/search/compare/51

Answer 2

In general, I will stop at this option.
5 RPM is still a key point ...
Thank you all.

Answer 3

I apologize, of course, that it’s late, but the question arose: why won’t a servo drive with a remote limiter suit you? The advantages of this option are an arbitrary rpm value and, as a bonus, you don’t need to be smart on the shaft.
True, a servo with such a moment will most likely cost a little more than an engine.