Here is a big catch that could be dangerous but profitable: Fernweh station. This is the sister cycler to Wanderlust station (see description in that thread), destroyed during the Fall by a nanoweapon. The station has an orbit taking it near Mars and Earth every 2.135 years. Some people/corporations/civic networks might fund an expedition to simply get rid of it - it could contain dangerous spores, and it would be good if the orbit got changed. But it also contained pre-fall cargo and passengers, so there is a some chance of interesting finds, Earth memorabilia and pre-Fall VIPs.