Old satellite dish

I'd go get it, but that's just me. Hand them a biz card and see if they have anything else you can take.
On the other hand they may just want your free labor disassembling it. Might be half a day job for very little pay.
Is it one of those steel mesh ones or painted aluminum? 30mi round trip or 30 miles one way? Disassembled or not? All things you should find out.

Edit: have them take a magnet off their fridge and see if it sticks

Junkman, First off it depends on what kind it is and what size. I installed them for about 4 years. They made them out of spun alum. which were solid. Then thin spun steel (kind of rare). And also alum. mesh with alum rib arms and a steel center plate and heavy steel cap that set on the post.
Usually the post was made out of double wall 6", sometimes cemented in.

Then they made them in 8' 10' and 12' unless it is commercial, then all bets are off. Usually they came with an actuator motor which rotated the dish. The solid ones usually were only 8' and the mesh in 10's and 12's. I think that covers it.

As far as would it be worth it, gonna be your call there but try to incorporate another trip with it.