Unfortunely I can't give advice on selling (beyond looking for dealers or perhaps looking for an auction house if you want to sell the whole lot off at once). We dealt with a couple of dealers and auctions when clearing out Mum's old house.

Getting rid of a hobby like this (particularly a long-standing one) is always a wrench, and the bigger the interest, the bigger the wrench. However, it sounds like you have made the right decision and for the right reasons.

I do suggest that you have an eye to your other interests though. When you scrap one interest (particularly one you refer to as an obsession) it will leave a hole in your life that will need to be dealt with one way or another, otherwise you will just fall back into your old interests again.

Good luck,

Chris.