Sell on eBay, good money.
Some can still be used or hang them on the wall for an interesting display.
where do you live I would love to have them! Woodworking,plumbing,leather goods,jewelery,farming,industrial...... what kind of tools??? need to know what kind they are for repurposing ideas or just use them for what they are supposed to be used for.
Yes, they can be worth some money. If old farm style isn't you, sell them!
I'd make a display on the wall. I tried to get one or two of my grandfather's but wasn't able to.