How much are my Shimano deer head FD and RD worth?

[averagebiker]

I am slowly going through my spares working out what I need/want to keep and what can go.
Some if it is old tat that will be given away or recycled.
However I have a deer head derailleur set, in used but good condition. I won't ever use them now. What is a realistic price these days?
Cheers