HELL NO on that IAI carbine!
Before gunandknife.com went down, the IAI carbines were taking a real beating on those boards. They've got cast receivers, cast op rods and ARE NOT MIL-SPEC. I wish those boards where still around so that you could read for yourself.
One of my friends bought one as a host for his registered M2 parts kit. Basically, none of the parts would fit. He sold it at a loss after never having even fired it. I know of three that have been purchased by acquaintances and they've all been disappointed by them.
I'm not saying they won't shoot OK, but if you want a "real" one, it shouldn't be an IAI. After the Iver Johnson and Plainfield blowups back in the 70's you'd think people would stay away from cast carbine receivers. The GI forged receivers won't hold up to more than 7000 rounds of full auto fire.
I had one built up on a new Sprinfield Armory receiver using all new mostly Inland post-WWII parts. My receiver isn't GI, but it isn't CAST either. The barrel indexed and headspaced right and the M2 parts kit fits fine. All together including reparkerizing I've got $500 in mine and it's in brand new condidtion.
The bottom line is that if you want a "real" one you can choose between an expensive restored one (MILTECH, Fulton) or a beater re-import from Israel or Korea. Otherwise be prepared to get a reworked parts gun of indeterminate quality or a clone of arguably inferior quality.