A few questions i'd like the answer to if poss.

Now I know about the basic HL model, the one with 2 speeds, 3 frequency transmitter etc, now are these all the same, the reason i ask is cos they sell for around £30 on the bay, but i've also seen the 3 frequency version in my local model shop for £120 (??)

The version with smoke and sound, are these models all proportional speed, allowing slow arcing turns? or is it the metal gear version that has proportional, and do they all have the exaggerated recoil action?

And finally, the metal gearbox version, I presume they are the s+s with a metal gearbox but do they also have metal sprockets and idlers? and is the gearing the same as the nylon geared version(I've heard somewhere that the gearing is more scale ie. slower).

TIA Geoff