When placing a value on an object, one must consider the market, ie. the means by which one sells such an object.
I can tell you the empty bottle is probably worth $10 to 20. I can also tell you the box adds value and the contents probably add a lot more. The difficulty is finding the buyer.
You cannot list a full liquor bottle on ebay - this is in violation of their rules.
I have reported on this forum many times about the site called "Master of Malt" which buys full liquor bottles. BUT - they are located in the UK so shipping to them, if they wanted the bottle, would probably consume any profit.
There is value here but the missing link is the auctioneer or website to sell it on.