Old Dom Vaules

[auroraborealis3]

I was given two bottles of Cuvee Dom Perignon, a 1969 and a 1976 vintage. Storage conditions have been good, although there was some extended regrigeration. Both are now safely in my cellar. Does anyone know if either is still drinkable? I am also looking for ballpark values. Some have told me to contact an auction house, and others have said to pour them down the drain (but how can you do that to a Dom?!, so I am really in need of some more input.