The problem with clock motors is all the ones I tried "step" from second to second - its not a smooth motion, but more like TICK (pause) TICK (pause) and you can SEE the stuttering in the laser effect. It's not desireable.
In any case, I personally think 1RPM is too fast anyway. If you're looking for a smooth, slow, "relaxing" lumia wheel effect, where one shape slowly transitions to the next, I'd say you don't want anything faster than 1/2 RPM (look at my video and decide for yourself). That's why I think the 1/3 RPM on eBay is perfect.
Someone asked me how to power this ebay motor since it ships with just 2 wires coming off it. I'm an electronics nubie too so this confused me, but the guy selling it told me what to do and it really was very simple...
All you need to do is splice the wires coming from the motor to any standard AC power cord, since the motor runs off standard 120 AV power.
I went to Target and bought a cheap extension cord for $5, chopped off the "female" part (sorry ladies), stripped the wire a half inch or so and twisted them together with the leads from the motor. Then I just wrapped it all up with electrical tape, plugged it in and it worked!
He also has a handy tightening screw on the wheel where it attaches to the motor so you can make sure the wheel is firmly attached to the motor (you'll need an allen wrench set, the hexagonal screw-type).
The whole thing is put together really well and I applaud the guy who sold it to me for an excellent product at (I think) a reasonable price.
I've been running it every night, all night for about 2 weeks now and it's still humming along nicely.
In my opinion, it's worth $35 so I don't have to do all the work of finding an appropriate motor, finding and cutting the glass, attaching a fastner & tightening screw to the glass, sizing it to the motor, etc.
But as TJ says, if you want to do all that work and save yourself maybe $10 or $15 (assuming you can find a motor and a place that will sell and cut the glass dirt cheap), be my guest!