If the speakers are in good shape, it is a really, really good deal! I wouldn't sweat the V2 vs V3 as if the system is only 1.5 years old, all the parts should already be V3s, the only thing you'll be missing is the magnetic grills.
I personally would go for it as you'll get the M80s upgrade + the sub almost for free. If you have the space and a bit of extra cash, I would sell the VP150 and upgrade to the VP180 and you'll have an amazing system at an amazing price.

Bruno
M80s/VP180/QS8s/EP600/AVR-890
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"The problem is choice..."