If the MAK90 is a slant cut reciever without the underfolder mods already made, give it a pass at that price. Economically it will cost more than it is worth to get it into a proper configuration. I have one like that, I paid a good deal less than that price, so it will be reasonable to have an underfolder installed on it, if I don't end up trading it for a ready to go Romanian rifle.
Anybody interested in a trade?