This falls in line with lub2safari's comments...
I bought this little German 16 gauge double for around $450...
cleaned it up and had the stocks refinished for another $400 or so including a new pad installed and having that silly cheek piece cut off. 27" barrels and swings like a dream... a beautiful and fun to shoot gun that after refinish weights an incredible 5.25lb on the nose... I'm pretty happy for $850.
that said, I am a pretty big fan of the American made early SxS and any of the Fox, Parker, LC Smiths, LeFever guns that are in decent shape are great guns that can be bought for a reasonable price and will only go up in value... that can not be said for much that has been built in the last 20-30 years. Shopping around just a little and you can find a decent Fox Sterlingworth in 16 gauge for under $1000. A nice 12 Gauge Sterlingworth or decent A grade easily under $1000.