Greg,
I know I'll get many angry responses to this but it's my opinion nonetheless. I wouldn't buy a Belgian gun with a 10' pole if I were in your shoes. (or in mine) By Belgian gun I mean Belgian but not a Francotte Best or some such other absolutely stellar gun of great provenance.
For similar money you can certainly buy an English gun and perhaps even a modest quality London gun. While a Belgian gun (or Spanish or Italian for that matter) sits there holding its own or depreciating, a London/Birmingham gun is going to be a lot better investment in the long run.
Beyond the investment, a London gun is built like a Swiss Watch and a Belgian gun could be built like absolute garbage or it could be built to a high grade...you almost never know the full story by looking at them.
No one ever tried to make a living faking Belgian guns en masse but that certainly can't be said for London guns being forged by Belgians. I think that speaks volumes as to where the better guns originate.
$6000 would get you a used Birmingham best or a mid-grade London sidelock with a few issues but great to shoot. In my opinion a way better option.
