I'd be very curious to see what SF/RPG stuff you have.  There really isn't a good resource for pricing of Traveller stuff (that I am aware of).

There are however, a number of people here (such as "Traveller") who have a very good feel for where the market is at for many of these items and they can probably tell you which ones are rare vs common.

Some sellers such as Crazy Egor have large stashes of some of the books and sells them at as low as $1 each.  Others are harder to find and worth much more.  Lots of 3rd party stuff out there as well that some of us here collect

If you have a list, post it.

JTAS 1-21,23 becomes:
Challenge 25-32,34-7
Space Gamer 15-75
all 1st Ed. Traveller books
High Guard 2nd Ed.
Supplements 1-13
Adventures 1-12
Double Adventures 1-6
four Alien modules (or six depending on how you count them)
The Traveller Book

GAMES: (GDW)
--------
Mayday
Snapshot
Azhanti High Lightning
5th Frontier War
Invasion Earth
Striker
Triplanetary
Imperium
Dark Nebula
Asteroid

Paranoia Press books 1-5

four Palladium books

IISS Ship Files (GW)

FASA:
------
A1-7, A10, DA1, B1-4, C1 (diskette)
High Passage 1-5 (mag)
Far Traveller 1,2 (mag)

Judges Guild:
--------------
75-490, 590, 760, 940

Gamelords:
--------------
10 books/modules

Different Worlds mag (lots of Trav. articles)
1-31

a few odds and ends.

There is a lot here of value, and we can figure out a lot of it, but condition is very important here.

How much rubbing is on the covers of the LBBs?
Is the Traveller Book hardcover or softcover? If hardcover, is the dust jacket present and in what condition is it?
Which Alien modules do you have, since there are eight alien modules for Classic Traveller?
Are the games complete? NOTE: I assume these are played so I do not ask if they're unpunched.
Which Paranoia Press books do you have?
What are the "odds and ends"?

Some brief notes regarding some of the valuables in this list:

Most of what you have in the Traveller RPG books is relatively common. Books 6-8, Supplements 10-13, and Adventures 9-13 will see a premium due to low print runs. Supplement 4 will see a premium due to popularity. The Aliens modules are not common so depending on condition can do well.

When selling Azhanti High Lightning, make sure you put Supplement 5 in the box, since that is part of the game.

The FASA stuff you don't see every day. Same thing with the IISS Ship Files and the Gamelords material.

Should have mentioned condition.  Most is like I just bought it.  Even the original books are quite good.  I've played Imperium and AHL (and maybe FFW).  Everything is intact, complete, and damn near Mint.  

The Traveller Book is HC, the dust jacket is not only present but nearly perfect.

The odds and ends include 4 sets of Martian Metals minis and one set of the paper minis.  Frankly, I haven't been into the collection in a while so I don't remember them all.

Alien Modules are Aslan, K'kree, Zhodani, Hiver.  I don't recall which are the big books and which small (may be both).  

Paranoia Press:
Scouts & Assassins (1st ed.)
Merchants and Marauders
Vanguard Reaches
The Beyond
SORAG

Palladium Books:
Mechanoid Invasion
The Journey
Book of Weapons
Homeworld

Just picked up a copy of Vargr for $7 plus shipping.  Obviously I'm finding it hard to transit from "collector" mode to "sell this stuff" mode...


I do have the four sets of minis on eBay ($48 ), with little interest.



For "cover price", this stuff ain't goin' nowhere.