I remember, someone once mention something similar, not sure if it was here. (search didn't find)
Suggestion: Exploration depot industry. Does not do anything until player "feed" it with survey data. Each data increase total score based on survey data rank (not linear, tho'. Something like lvl5 data ~ 20-50* lvl1 data). That value exponentially determines building level. On a lesser ranks will not generate nothing but income monthly, based on rank. From some point there are progressive probability of obtaining some resources, common or uncommon weapons and LPC, etc. Highest ranks (really-really hard to obtain, like full survey data of a half of a sector) can provide a small chance of obtaining some rare special items. Almost forgot: Upkeep is increasing with rank.
Cath: Building generates player faction "Salvage fleet", that run from home to random picked full-explored planet and back. If it is destroyed because any reason - building is disrupted for X month, but upkeep remains. Fleet strength based on market fleet size and quality values, but it is significantly weaker, than average detachment from this planet. Also, contains a lot of salvage rig role ships.
If removed from market, all survey data inside building goes to storage.