$$$$$$$$$ what are they worth????????

I may be wrong, but looking at them I wouldn't give over $75 for the manifold & $50 for the carb. I think the manifold is an outdated design but may have a following. The carb looks like it'll need a kit. It might be worth a bit more.

Start low. It's always easier to go up than down.
Maybe if you're buying it's easier to go up in price,but not if you're selling. If the carb works ok, the package should bring $150-175 to the right person. That Holley street dominator is actually a pretty good manifold for a mild street engine. The carb looks like an early Edelbrock version of the tried and true Carter AFB. A good package for a 2bbl to 4bbl changeover if you're not going to change internals too much.