I just bought a used turbo off of craigslist for about $150 and was curious if this was a good price for this part. I purchased it for a project 82 280zx with a not working turbo and was curious if this was a good deal?

That depends, if it is in good useable shape it is on the high side ok, if it needs a new CHRA then not by any stretch of the imagination. A new CHRA can generally be had for between $100 and $150, and by adding an hour or two and maybe some new hardware, you have a completely rebuilt turbo.