edit: Had I known, I'd have gotten this on bandcamp for 13 USD: https://valvestudioorchestra.bandcamp.com/ No code, though.
Shipping for a single CD is 6.25 USD to New York.
I don't know how many of these are new songs. The Orange Box Soundtrack already had some of these: https://www.amazon.com/Orange-Box-Original-Soundtrack/dp/B0011V1W9U