Sweep-
You don't state your location in your signature or on your profile.
If you let us know what part of the world you're writing from, we can possibly direct you to either *known good* gunsmiths and gunbuilders, or possibly a place near you where there are more similar hunting guns, so that you can compare what you've seen to other Combination guns and Drillings - and compare the value of what you're being offered.
Without photographs of what you are discussing here, it is totally impossible to evaluate whether or not this $5000 would be worth it or not.
Also, at that price range without the gun in the hands - the internet is still not the place to evaluate the worth and fitness of a $5000 gun purchase.
If you don't know what your're getting into, hesitate.
$5000 can get you a very nice, functional 'Like New' condition drilling in common calibers that you won't need to worry about reloading for, and that you won't loose money on when it's time to sell the gun later.
What part of the world are you from?
--Tinker
