Estimation de mon pC

Bonjour,
Voila, j'aimerai vendre mon ordinateur pour m'acheter un PC portable et j'aimerai que vous me fassiez une estimation de sa valeur sachant que je le vend avec l'ecran, la souris, le clavier et les enceintes :

Système d'exploitation
Windows XP Professionnel (build 2600) Service Pack 2

Carte mère
SMBios version 2.5
ASUSTeK Computer INC. M2N-MX SE Plus Rev x.xx
Bios: American Megatrends Inc. 0302 12/04/2007 taille: 1024Kb

Processeur
AMD Athlon(tm) 64 Processor 3500+ (2210Mhz) (L1: 128ko L2: 512ko )
Chipset
Northbridge: AMD-8131
Southbridge: NVIDIA MCP61

Mémoire
Barrette de 512 Mo 667 Mhz Manufacturer0
Barrette de 512 Mo 667 Mhz Manufacturer1

Carte Graphique
nVidia Corporation GeForce 6150SE nForce 430 (512 Mo)
Lecteurs CD/DVD
LITE-ON DVDRW SHW-160P6SPRS2 (DVD+R/DL Recorder)
SCSI DVD-ROM 1.0

Disque dur
HDT722516DLA380 (153.38Go)
Generic USB CF Reader USB Device
Generic USB MS Reader USB Device
Generic USB SD Reader USB Device
Generic USB SM Reader USB Device
Cartes PCI/AGP

Stockage
nVidia Corporation:MCP61 IDE
nVidia Corporation:MCP61 SATA Controller

Affichage
nVidia Corporation:GeForce 6150SE nForce 430

Multimedia
nVidia Corporation:MCP61 High Definition Audio

Mémoires
nVidia Corporation:MCP61 Memory Controller
nVidia Corporation:MCP61 Memory Controller

Ponts
nVidia Corporation:MCP61 LPC Bridge
nVidia Corporation:MCP61 PCI bridge: MCP61 PCI bridge
nVidia Corporation:MCP61 Ethernet
nVidia Corporation:MCP61 PCI Express bridge: MCP61 PCI Express bridge
nVidia Corporation:MCP61 PCI Express bridge: MCP61 PCI Express bridge
nVidia Corporation:MCP61 PCI Express bridge: MCP61 PCI Express bridge
Advanced Micro Devices [AMD]:K8 [Athlon64/Opteron] HyperTransport Technology
Configuration: K8 [Athlon64/Opteron] HyperTransport Technology Configuration
Advanced Micro Devices [AMD]:K8 [Athlon64/Opteron] Address Map: K8
[Athlon64/Opteron] Address Map
Advanced Micro Devices [AMD]:K8 [Athlon64/Opteron] DRAM Controller: K8
[Athlon64/Opteron] DRAM Controller
Advanced Micro Devices [AMD]:K8 [Athlon64/Opteron] Miscellaneous Control: K8
[Athlon64/Opteron] Miscellaneous Control

Bus Series
nVidia Corporation:MCP61 SMBus
nVidia Corporation:MCP61 USB Controller
nVidia Corporation:MCP61 USB Controller

Clavier
Clavier standard 101/102 touches ou clavier Microsoft Natural Keyboard PS/2

Souris
Souris HID

Ecran(s)
Écran Plug-and-Play( AL1706)