Those are really expensive too. This car will be completely custom fro about the same price.
There's a reason these models sell for cheap on ebay. The metal is iffy and the finish is average. With a little work, they'll be pretty good though, I'll need to spend a bit of time with a file to get rid of the ridges and seams. Here's where I'm stopping for tonight. With a wirebrush on my my Dremel tool, it looks pretty good.