I have a standard amount in my game bag around 25. I also have some random ones in a jar that have not been part of anything and some convention sets that were only used at that convention.
About 30 in my going-out-to-play roll, a few hundred custom d6s of many designs that I designed and had made in 2015-16, and, ah, assorted others. I got quite into designing dice, to the extent of custom dice for campaigns, until the pound suddenly sank in 2016, and it seemed time to stop.
About 20 unopened sets of d&d dices ( ordered pound of dices from aliexpress for couple of euros). 2 sets of metal dices for d&d, one bought, one made by me as part of my bacc degree project. Couple of fancy regular dice sets for d&d. 30-40 regular d6. Ankh cross VtM 10s set by Chessex ( i can't believe they go for 80+ usd on ebay, i bought them for couple of bucks in my LGS back in a day).