I don't know how much they appreciate in value much, but I do not think a quality tool drops in value as fast as many items, no I am not interested in paying more than needed for a tool,
I have seen some live auction stuff go for more than new, torches and wrenches sets seem to hold there value on most farm auctions I have been to, (I think some of that is people do not know what they could buy it new for), and they start bidding and get carried away,
any thing is only worth what some one will pay for it, a lot of it is how needed it is, or it rarity or its quality,