For a collection that diverse you will have to break up to sell it. It would be to your advantage to do so anyway, you would get much more for it. You will not find one collector who is interested in buying a collection that diverse at a retail price. If you wanted to sell the whole collection in one shot you would have to price it significantly less than the retail market.
That being said, send me a message with some more information when you have it. I may be interested depending on the details.