Help Valuing some used equipment

[Mitsu3000gt]

I was just wondering if I could please get some opinions on reasonable asking prices for the following items. I've been out of the car audio scene for a while, and just picked up a new car full of Brax stuff so I won't be needing my old stuff. Everything is in as-new condition:

-Alpine MRD M-301 Amplifier
-Image Dynamics ID 10 Sub in a 0.7 cubic foot sealed MDF enclosure
- Alpine CDA-7995 Head Unit
- Stinger 1farad power cap

Thanks in advance.