See Alternity's posts above... if it's not worth buying the VP, why do it at all seeing how many hate it? And if you do get enough for your money, it's also worth buying them to resell for creds.
One problem with levels, VP, buffs etc is that they are effectively allowing people to pay... to not have to play! Plenty of talk about this already, but in short lately there's been much talk and plans to get more people, stop much of the content not being used. Offering a way for cash to now skip the very things that need people is quite counterproductive. Not to even mention how bad many players - myself included - feel about the thought of buying levels etc in the first place.