Why are used PSP's so expensive?

1. Because every PSP game is literally on the internet for free.
2. The PSP can run MAME and other Emulators and plat online via Kalleria.
3. The PSP can also ( at least second generation ) link up to the television and or display with correct connections. A pass through was made for the original but they changed the inputs.
4. The PSP is the perfect handheld that hold the Gameboy image.
5. You can emulate PSP on most modern computer hardware.