So if it was complete would it be a 4-4.5k car?

Well to make it a copmplete car again you will probably end up having to buy a complete kit and interior. I'd knock off between 500 and 1000 off the price...

That's a rough guess. Bit difficult to put an exact figure on..

Edited to say, depending on how close the kit is to matching the origional paint, you might have to get it painted!!!