Where are you located? If in the U.S., take a look at fedka.com. Yuri is fantastic to do business with and has a number of Kiev-4 models listed right now at the same price level. You could even save a little by going for the Jupiter-8 lens.
IMO there is no reason to wait for a package from Ukraine, even from a reputable seller, if you can get practically the same deal close to home. I've only ordered from Fedka twice, a Helios-103 and some accessories. Both times the delivery was lightning quick (Yuri processes orders after his day job, I think) and the goods exactly as advertised.
Let me also put a plug in for the real deal Contax. I bought my IIa body on the bay for $139 plus shipping. Took a bit of a chance there, as the seller claimed not to know much and had lousy photos. Turned out to work perfectly, except for the T setting, and the focus being too stiff to use the finger wheel.
If you do go for Contax, keep in mind that the very popular and affordable Jupiter-12 wide lens will not mount on postwar bodies (IIa/IIIa), only on the pre-war II/III and their Kiev clones.