[gekko]

Shenmue II (DC, PAL): $45
Shenmue II (Xbox, US): $10

You can actually make money selling original copies and buying the re-releases. For example:

Sell: Resident Evil Code Veronica X (Gamecube): $33
Buy: Resident Evil Code Veronica X (PS2): $1.50

Sell: Panzer Dragoon (Saturn): $14
Buy: Panzer Dragoon Orta (Xbox): $3.50

Sell: Sonic Adventure 2 (DC): $26
Buy: Sonic Adventure 2 Battle (GC): $13

Sell: Ikaruga (GC): $23
Buy: Ikaruga (XBLA): $10