Unfortunately, in the shape it's in, probably only worth about $1500! Sad That's way more than I paid for it but not enough to sell and renovate my Masterbath! Wink I was really hoping that it would be more like $5K +...it's over 500 years old!
LOL,Yeah, well, even if period, your chest has had a very hard life and just because an object is old, does not mean it has great value. It will probably cost many times it's present value to restore properly which is why it has limited collector appeal. Still, if it is period and thats a BIG if, a museum that specializes in medieval objects would most likely be your best bet if you wanted to sell it.
I know I've said it a million times but it's worth repeating, one can not authenticate old furniture with photo's alone, it takes a hands on in person, under 1000 watts of halogen light, preferably on a pedestal turn table by someone who knows what they are looking at to know for sure.