Vinyl Records
I have around 5000 or so. Huge range of genres, eras, etc.
Stopped buying them a few years ago when we started having kids and I sold my turntables and converted the listening room into a nursery. Hope to have a listening room again one day. Occasionally buy vinyl at shows which I hardly ever get to go to anymore.
Also guns and ammunition although that hobby is also on hiatus with the kids.
Finally, some silver coins such as Britannia, Philharmonics, Canadian Maples, and the Perth stuff (koalas, lunars, kookaburras), as well as the short lived ATB USA coin set in silver.