Updated item list with prices:
I currently have about 1.8 million K-marks and can purchase the advocates (76,000) and shatterguns (54,000) from the ICA shop. The ratio would be 7600 K-marks to 10 fg, so the advocate = 100 fg and shattergun = 71 fg
Smart mesh (4) = 25 fg each
Savage marauder flesh (1) = 60 fg
Unique data drives (2) = 75 fg
Advocate (1) = 100 fg
Shattergun = 71 fg
Purple helm (7) = 40 fg
Purple armor (1) = 134 fg
KBR Longshot (1) = 130 fg (99k K-marks purchasable)
Hammer (1) = 96 fg (73k K-marks)
Purple Backpack (1) = 60 fg
Blue Backpack (25) = 30 fg
Blue Armor (17 normal, 1 resto) = 35 fg
Blue Helmet (35 normal, 1 resto, 3 tact) = 15 fg
Veltecite Heart (1) = 150 fg
Pure Veltecite (1) = 20 fg
Clear Veltecite (3) = 10 fg
Dustbloom (7) = 10 fg
Autoloader (3) = 40 fg
Gyroscope (1) = 35 fg
Master Unit CPU (6) = 65 fg
Portable Lab (3) = 50 fg
Meteor Core (2) = 40 fg
Blue Runner Egg (3) = 15 fg
Shock Absorber (20) = 10 fg
Biological Sampler (10) = 10 fg
Sample Container (3) = 10 fg
Shard Slicer (2) = 10 fg
Heavy Strider Flesh (10) = 10 fg
Marauder Flesh (4) = 10 fg
Titan Ore (20) = 10 fg
Zero Systems CPU (25) = 5 fg
Co-Tec Multitool (14) = 5 fg
Old Currency (42,265) = 55 fg total
Strong Stims (green, stack of 5) = 4 fg per stack
Boss' Office Key 17/18 (1) = 350 fg
Armory Key 8/12 (1) = 100 fg
Garage Office Key 12/12 (3) = 100 fg
Garage Office Key 6/12 (1) = 50 fg
Luggage Saferoom Key 12/12 (2) = 100 fg
Luggage Saferoom Key 5/12 (1) = 40 fg
Scrips (504 Korolev, 701 ICA, 886 Osiris) = 33 scrips for 20 fg