First thing, a part of new airbrushes on ebay are real new airbrushes, specially when they come from ebay shops ( instead of paying taxes and rent a place, you stay home and open a virtual shop ) There are fine and honest people and there are thiefs, feedback can be a good source of information.
Second thing, in this peculiar case, prices at Obeeliks are the same than on ebay so no need to go ebay if you can talk to real persons.
Third thing, I don't pretend to be any expert but I know a little the airbrushes ( stress on "little" seriously ) and I'd consider Evolution if I were you, specially the new Silverline (good grief, what am I doing with my three Evolutions now that I have seen the new ones ?...) as they are great airbrushes.
A little time ago, a chap here said he considered Evolutions as top airbrushes in the same range as Iwata Custom Microns and Sotars ( I don't remember if he mentioned Paasche ABs ) and I said that they were close in my opinion but a little in the second row. Afterthoughts, I think I was wrong and he was right. If they are on the second row, it must be dead heat.
Naturally, this only expresses my personal opinion.
Talk to the people at Obeeliks, they are VERY nice.