I was cleaning out a cabinet and came across many old / antique liquor
bottles that are at least 20 to 30 years old, some older and most and
full and sealed and in the original boxes. I will describe some of them.
I am looking for the best way to sell them and an idea of how much
they are worth. Ideally, I would like to be put in contact with a
collector who is interested in buying them as opposed to listing each
nand every one on ebay. I can send photos to anyone who is interested. 

two seagram 7 750 ml sealed whiskey bottles that are embossed in the
original christmas boxes

one sealed Ballantines quart schotch bottle in the original gold box

several jim beam whiskeys in the christmas boxes

iw harper bottle 

canadian mist sealed bottle in original box

sealed Saronno bottle and many others. 

Let me know what I should do or if I should just dump them. 

I will provide a nice tip if you hook me up with someone who buys them.

Well, Merry Christmas!  Don't "dump" them unless you and all your
friends are teetotalers.

Whoops!  I hit the tab key and posted that before I had really started.
The whiskey/whisky is still very drinkable, and there may well be
people that collect old bottles and original cartons.  Of course, many
collectors are only interested in single malt whiskys and really old
bottlings and unusual bottles.

I can't guide you to potential buyers but would suggest an ad in your
local or nearest major newspaper (and I don't know what tax or
licensing problems could be involved for selling several bottles).  At
worst  - or best - you could give them away.

In general, bottles need to be a lot more than 30 years old to have
significant value.  Yours may well be worth something (especially the
full, sealed ones) to the right person, but I'd be surprised if
they're worth very much.  One thing you can do is to do some searches
on eBay, and if anyone is selling similar bottles, you can see what
people are bidding for them (be sure to check the completed auctions
as well as current auctions).