Real Uzi? Well that depends on your definition of real. It was not made outside of the US, but it was made semi auto under a license from the Israeli patent holder if that's what you mean.
Is it a full auto submachinegun Uzi? Certainly not, not at that price. Transferable Uzis are approaching the $10k mark in todays market.
"real" Uzis fire from an open bolt, this one you are looking at does not.
Is it an assault weapon? Nope. No such thing now.... preban
or postban is just a useless term now.
What you are looking at is a 16 inch barrel, probably 9mm folding stock carbine.
Is it worth $599? Well, you will have to decide that. Vector is one of
the better built versions and they are kinda fun to shoot. The long
barrel makes it a bit cumbersome to use for it's original CQB purpose,
but they shoot very well, mags are not too horribly expensive, and
if you want a gun that looks like a submachinegun then that's what you
would get. They used to come with a short solid piece of steel called
a "dummy barrel" for display use, not sure if that is still the case.
If you want to get fun, and your location allows it, file a Form 1 with
ATF for a short barreled rifle then you can put a real submachinegun
barrel on it to complete the look. Those are fun shooters as well.
But, it's not an "assault weapon". It did not meet the legal definition of that term in that it only had 2 of the 5 "evil" features:
1) Folding stock
2) Pistol grip
It did not have a third, which would have made it an assault weapon:
3) Normal capacity magazine (over 10 rounds) not a reduced capacity
4) Flash hider
5) Bayonet lug
I didn't look a the one you mention, but some models come with the bayonet lug which, although totally useless on a submachinegun, do make the thing
what would have been called an assault weapon because that would make 3 of the evil features. If the one you are looking at has a bayonet lug, then it would have been called an assault weapon when that law was in effect.