I'm replacing 3-4 old projectors over the next week, and also have an older larger projector that works but has a bad bulb. You think sell on CL, or what?
The larger one can go, I may keep the smaller ones until they croak. One of them is having issues (these have issues with the light pipe failing but I fixed 2 out of 3 of them).
I would say to check what they go for on CL or Ebay and decide if it's worth the time. You can always donate to Goodwill who will re-sell or recycle them. You could also consider donating it to a nonprofit that may need one, depending on the cost of the bulb.