That seems a good price for the carburetor sparker, but remember it is GX120, not GXV120. The GX120 and GX140 are horizontal crankshaft engines, so the linkages are different, and in the case of the GX120, which has a built-in fuel tap, there is a sediment bowl, which the GXV120 doesn't have. Essentially, buying one of those would mean you had to do a cobbling job with unknown outcome.
I'm pretty sure the 1.3 litre ultrasonic cleaner with heating is only 50 Watts. Look way down at the bottom of the page.
