Yes on on the chokes(they are often tight)
Things to look at:
*chamber length (usually, though not always marked (65mm is 2 1/2 inch)
*Bluing on barrel flats usually indicates a rebluing at some point (if reblued check ribs for rust and looseness
*Wall thickness if you have a gauge
*use a piece of wood as a snap cap to look at the firing pin impressions (you can check the function of the safety at the same time)
*with forend off check the looseness of the barrels (guns beginning to go off face often feel tight with the forend on, but reveal the beginnings of looseness with the forend off)
*get a feel for how the triggers feel (too heavy, too light, just right)
*look hard inside and out on barrels for dents (often a dent is repaired but a thin spot is left)
*look at the muzzles to ensure the tubes touch on the inside (if they don't the barrels maybe cut)
*verify the balance point (butt heavy can be a sign of cut barrels even if the barrels appear uncut)(29.5 is not an unusual length of barrel on a german gun, but you never know for sure)
German guns, like Belgian guns can be a really good value for the money as shooter, but I would not assume fixing it up and turning it around for money is very likely.