First off is Ars Magica's Covenant for 5th Edition. It was the most expensive of the lot at $8 but compared to its cover price it is a bargain. I always valued Ars Magica stuff as a supplement to my fantasy campaigns. Those of you with the Majestic Wilderlands Supplement and my Scourge of the Demon Wolf probably detected a strong Ars Magica vibe in both. Never ran the game itself tho. Although with the way cleaner presentation of 5th edition it is tempting.
I always been a big fan of Babylon 5 and even ran a few GURPS B5 campaigns. One was memorable for teaching me the hard lesson of never letting anybody, especially Tim Shorts, take the unfazeable advantage in a sci-fi involving the mystery and wonders of the B5 universe. At .50 it allowed me to add to my Mongoose Traveller for B5 colleciton.
Next is a was a real find. A Traveller Digest at a decent prince. I didn't have this issues so I snapped it up. Digest Group produced some of the best Traveller products ever. Nearly all their stuff is gold..
Next up is the Hero System Bestiary. I been slowly rebuilding my First Edition Fantasy Collection just for nostaglia. The internet makes it feasible to do it from my home. I just wait for the right price and buy the item. At 50 cents this can be beat. As Bestiary goes it not very good. Even when it first came out I was a bit disappointed. Its successors in 5th and 6th edition vastly superior.
Next I found a copy of the edition HarnDex. The very first product for Harn was a folio that came with a map, and two books. The Harnview which had the history, some generic chargen table, and of course the famous Harn Weather Chart. The second book was the HarnDex an A to Z encyclopedia of all things Harn. Most entries were just a paragraph but they managed to pack a lot of information in there. My originals worn out and I managed to get a new set. But when I saw this for 50 cents I couldn't pass it up to get an extra copy.