Sorry to hear the sad news Mr. Blake. I would second the excellent suggestions put forth by "Curtisimo". I have dealt with four of the five he suggested and I am sure the other is just as good and honest. I do not know if they take consignments but you can ask them. If by chance none do then please come back to this list and ask again and we can recommend some others. SC
Sorry to hear about your situation, Robert. A friend of mine had bladder cancer for many years - and it was not what killed him - in his late-80s. So hang in there. It is very treatable, from what I have seen. I think with my ancients - which are not especially valuable - I think I'd just let my survivors know the flips are fairly accurate and they should just use that as a guideline to sell them off on eBay. Take good photos and start at the price at what I paid for them and see what happens. But I only say this because my collection is not very valuable. Again, hang in there.