Are you still looking for PRS-505s? I have a silver one with the James Patterson collection and skin (installed). Cosmetically clean and no problems functionally. Came with tan cover but I bought a Dooney & Bourke leather cover for it which cost me $80. I also bought a charger (for PSP but works fine with PRS-505). It's flashed with the latest firmware.
You'd get the reader (with James Patterson skin installed), tan cover, Dooney & Bourke leather cover, charger and James Patterson 1 through 6 set.
I'm not seriously selling but if the price is right...