Alien Artifacts (EU2012)

Item name	Gray Market Value §	Required for research/foundry project	Required for manufacturing
Sectoid Corpse	5	Sectoid Autopsy, Xeno-Biology	Uplink Targeting (Aim) (3x)
Sectoid Commander Corpse	10	Sectoid Commander Autopsy
Thin Men Corpse	5	Thin Men Autopsy, Improved Medkit (4x)	None
Chryssalid Corpse	5	Chryssalid Autopsy	Chitin Plating (4x)
Outsider Shard	N/A	Outsider Shard	Skeleton Key (1x)
Floater Corpse	5	Floater Autopsy	Defense Matrix (Dodge) (x3)
Heavy Floater Corpse	5	Heavy Floater Autopsy, Advanced Repair, Advanced Flight (2x)
Muton Corpse	5	Muton Autopsy, Ammo Conservation (6x)
Berserker Corpse	5	Berserker Autopsy	Combat Stims (1x)
Muton Elite Corpse	5	Muton Elite Autopsy
Drone Wreck	2	Drone Autopsy, Drone Capture (4x), Improved Arc Thrower (4x), Advanced Flight (2x)
Cyberdisk Wreck	7	Cyberdisk Autopsy, Advanced Flight (2x)	UFO Tracking (Boost)(x2)
Sectopod Wreck	10	Sectopod Autopsy, Advanced Construction (2x)
Ethereal Corpse		Ethereal Autopsy	Mind Shield (1x)
Elerium	3	Elerium, Improved Pistol III (20x), S.H.I.V. Plasma (15x), Stealth Satellites (20x)	Skeleton Key (10x), Elerium Generator (30x), Psionic Lab (20x), Plasma Cannon (10x), EMP Cannon (10x), Fusion Lance (10x), Hover S.H.I.V. (20x), Firestorm (5x), Mind Shield (20x), Light Plasma Rifle (?), Plasma Rifle (?), Alloy Cannon (?), Heavy Plasma (?), Plasma Sniper Rifle (?)
Alien Alloys	2	Alien Materials, Carapace Armor (10x), Skeleton Suit (15x), Beam Weapons (5x)	Combat Stims(2x),Carapace Armor (15x), Laser Sniper Rifle (23x), Heavy Laser (23x), Scatter Laser (23x), Laser Rifle (13x), Laser Pistol (8x), Skeleton Key (10x), Laser Cannon (21x), Chitin Plating (10x)
UFO Flight Computer	40	Alien Nav Computer (2x), Stealth Satellites (3x)	Firestorm(2x), Satellite Nexus (2x), Blaster Launcher (2x)
UFO nav-computer (damaged)	20	None	None
UFO Power Source	75	UFO Power Source	Firestorm(1x), Elerium Generator (2x)
UFO Power Source (damaged)	30	None	None
Weapon Fragments	1	Weapon Fragment (5x), Plasma Pistol (40x), Beam Weapons (10x)	~All Weapons~
Alien Food	10	None	None
Alien Entertainment	17	None	None
Alien Stasis Tank	10	None	None
Alien Surgery	10	None	None
Fusion Core	125	Fusion Lance, Guided Fusion Launcher	Blaster Launcher (1x)

Note: Weapon Fragments, Alloys, and Elerium are used to manufacture most items in the game. This is why their resale value is so low and why obtaining a precise number required for each project is so difficult - due to variances in the number of engineers, workshops, etc. Unless you are seriously strapped for cash, try selling something else instead.