Shimano cranks.

[Leighcal]

I have some shimano cranks from a bike I bought and am wondering if they worth anything? The model number is fc-mc16. I know things are usually only worth what someone wants to pay at the time but just a ball park, fair figure will be good.
I may be asking about other things later on or I may just add it all to a for sale thread with what I think are reasonable prices and if I'm way out just accept offers.

Thanks in advance for any advice
Leigh