Ok, we have gathered a general list here, but obviously, not all BPOs can be bought and/or researched at the same time.
So I figure: 'first things first'.
Of chars who regularly encounter hostile situations (regular pvp-ers and 0.0 inhabitants), I would like a setup of your current ship(s). Be it a copy-paste out of EFT, a screenshot of EFT. Anything I can deduct your setup from. Of this I will inventorize (is that a word?) what will be needed. I will prioritize on things that will be used most (so weapons prolly).
Keep in mind that I can only buy the BASIC BPO's (be it T1 or T2), so I can't get you 'scout' guns, 'arbalest' missile launchers, Y-S8 Hydrocarbon Afterburners, etc. The basic stuff will keep you going though.
This way I hope to streamline our equipment BPO-program, and not have a bulk of 300 modules and not knowing what to buy first.
(ofc, when you have multiple ships/set-ups, post em all, but try to tell me what you use most)