Valutazione e info notebook

Ho in casa un portatile con queste specifiche:

CPU(s)
Number of CPUs 1
Name Intel Pentium 4
Code Name Northwood
Specification Intel(R) Pentium(R) 4 CPU 2.40GHz
Family / Model / Stepping F 2 7
Extended Family / Model 0 0
Brand ID 9
Package mPGA-478
Core Stepping C1
Technology 0.13 µ
Supported Instructions Sets MMX, SSE, SSE2
CPU Clock Speed 2638.3 MHz
Clock multiplier x 24.0
Front Side Bus Frequency 109.9 MHz
Bus Speed 439.7 MHz
L1 Data Cache 8 KBytes, 4-way set associative, 64 Bytes line size
L1 Trace Cache 12 Kµops, 8-way set associative
L2 Cache 512 KBytes, 8-way set associative, 64 Bytes line size
L2 Speed 2638.3 MHz (Full)
L2 Location On Chip
L2 Data Prefetch Logic yes
L2 Bus Width 256 bits

Mainboard and chipset
Motherboard manufacturer ASUSTeK Computer Inc.
Motherboard model L3000E/T Main Board, REV 1.xx
BIOS vendor Award Software, Inc.
BIOS revision 0208
BIOS release date 11/25/2002
Chipset SiS 650 rev. 01
Southbridge SiS ID0008 rev. 10

Memory
DRAM Type DDR-SDRAM
DRAM Size 256 MBytes
CAS# Latency 2.0 clocks
RAS# to CAS# 3 clocks
RAS# Precharge 3 clocks
Cycle Time (TRAS) 6 clocks
Bank Cycle Time (TRC) 10 clocks
# of memory modules 1
Module 0 Nanya Technology DDR-SDRAM PC2300 - 256 MBytes



Essendo un portatile non c'ho mai messo mano dentro, totalmente niubbo in materia, si può espandere la ram a 512 o + in qualche modo?

E a quanto lo potrei vendere?