It took many years.
My grandparents and aunt started a retail store in the mid-50s and my parents took it over in the early-60s and the store closed in 1989. Man, talk about a lot of stuff that hung around for at least ten years. We finally found a similar store and sold most of it on consignment.
I can't imagine even the most enthusiastic junk collector attaining that much stuff.
I had a friend whose father left him a rare gun collection of over 100 guns. My friend was so sickened by guns, for many reasons, that he just dumped them in the ocean. I understand this being a law student now and the incredible liability that involves selling weapons and possessing items which used to be legal many years ago, but are not today (post WW-I Thompsons, silencers, and the rare Japanese army grenade launcher). The craziest thing I ever saw for sell in a gun shop was a live round from a battleship from the second world war.
My parent's store sold antiques and one piece was a samurai sword which was old and very dull. It wasn't even a nice piece but we had to sell it to an antique store and massive legal documents had to be signed in the turnover of that sword just in case some idiot gets hurt with it. The legal fees, on both sides, cost far more than that stupid sword which is considered, by it's nature, a deadly weapon. The same is not usually the case for sword replicas.
One great, local pawn shop used to sell a ton of great stuff, including handguns but the insurance and liability protection, in California, became too costly. If a person commits a crime with a handgun, today's laws, and even cases going back over 150 years can implicate the gun shop owner, previous gun owner, and even gun manufacturer.