PocketMatrix

Hey guys, how much do you think I could get for my computer, specs below? I want to sell it and try to get a TabletPC.

Computing Components:
Full Tower Antec Case (6 5.5" bays, 2 3.25" bays, 300 watt Ensign power supply)
Yamaha CDRW 16x10x40x
Pioneer DVD (not sure about speed)
Asus A7M266 Motherboard (2 USB, 2 slotted USB. Built in audio. PS2 and other legacy ports)
1.33GHZ AMD Athlon
512MB DDR SDRAM PC2100
VisionTek 64MB Geforce3
10/100 SMC EZ PCI Card NIC
40GB Quantum Fireball ATA100 HDD
Sound Blaster Live! X-Gamer 5.1

Cooling Elements ($280 at purchase):
Black Ice XTreme Radiator (1/2" hose barbs) with
..120mm Panaflo M1A exhaust fan (4.08 watts, 86.5 CFM, and 35.5 dB-A) with molex lead
Geforce3 waterblock (3/8" barbs)
Chipset waterblock (3/8" barbs)
Athlon CPU waterblock (3/8" barbs)
Eheim 1250 pump (317 GPH) (3/8" and 1/2" barb)
10" of tubing, pre cut to length

If I tried to sell this rig, how much do you think I would get for it?

I have a laptop that plays games faster than my desktop. I don't play many games, anyway. I'm much more into mobility and technological advances. Plus, the Tablet I want is fast enough to play Jedi Outcast, and with remote desktop and built in WiFi I don't even need my tablet to have horsepower.