Frankly, I'm only answering here because of belief any serious question deserves recognition and attempt at a credible answer.
A non-original "Anniversary Model" loses a central character essence. If it's also mfg without any external safety, I'd think more than a few interested and an auction likely best for determining value by result. If a 'halfa' in terms of old & new features, less interest and more wild card. Dealer's shelf might be a good nesting place!
About ANY valuation request far better with photos!
Just an off the cuff 'opine'!