Especially don't buy: old-school digital IC assortments (if they still market those) and electrolytic capacitors. If you are using substantial discrete digital

Especially don't buy: old-school digital IC assortments (if they still market those) and electrolytic capacitors. If you are using substantial discrete digital logic in 2023, we can be friends if we're not already, but you shouldn't be giving people advice on stocking their workshop. Electrolytic capacitors have a shelf life, and you'd be amazed how time flies. I've thrown out old electrolytics (>10 years) at more than one employer now.