MTX3 Prospec is the most expensive kit compare to other high performance kit in the market like Kyosho V1 RRR WC and Serpent 710. I've seen people don't want to spend too high on premium cars like Mugen Seiki, so they settled it with kyosho cars, G4, etc.
IMO, lots of people are going to hold their breath, or wait and see, or just dreaming but take no action if the price of MTX4 is going to be more expensive than MTX3 Prospec.
BTW Jo guiterrez : ..... can't take my eyes looking your avatar girl...... she is really sexy, I'll give up RC to play with her !!!