old/bad knock sensor

i have an idea for a class project and would like a broken or old knock sensor. let me know, thanks.

nobody has a trashed one laying around?

I got a few...

can you send them to me please?

What are they worth to you?

I've got 3 crusty ones sitting on my bench. Send me your address and I'll mail them to you.

Pm's sent

pitch black, i received them last thursday but forgot to post. Thanks :thumb: