my god... i feel so inferior... ~_~ ...anyway, here's the gems of my collection...
Mushihime-sama, WITH promo poster and phone card.
Einhander (US ver) freakin MINT... got it "used" for $30, but part of the jewel case's sticker-seal was still intact, leading me to wonder how "used" it actually was...
Darius Twin, with box and manual. paid all of $6 for it.
Loose copies of R-Types, RayStorm, Thunder Force V (which was $3, believe it or not), Metal Slug X, G-Darius, Mars Matrix, and several other "staples" available in the US. (i still lack R-Type Delta, dammit all...)
1943, with instruction manual... i thought those things decomposed over time or otherwise mysteriously disappeared, but i found the game used for $13, WITH manual intact
Gradius V, with the Gradius Breakdown DVD...
well, out of the 109+ games in my collection, those are my current pride-and-joys ^^