Sem fazer propaganda, mas já fazendo, se eu fosse comprar um notebook e tivesse pouca grana compraria esse abaixo. O notebook pode ser dividido em 6x de 890,00. Qualquer bico que você fizer você para um parcela. Além do que esse notebook se paga. Da uma olhada na memoria cache. 
http://produto.mercadolivre.com.br/MLB-43124286-notebook-sony-vaio-centrino-16512mb80gbdvdrw154nf-_JM
Descrição: VAIO FS640/W Notebook (1.6GHz Pentium M 730, 512MB DDR, 80GB, DVD±R DL, Windows XP, 15.4" TFT)
Fabricante: Sony
Processor Class: Intel Pentium M Processor
Processor Speed: 1.6 GHz
Installed Memory: 512 MB
Maximum Memory: 1 GB
Memory Technology: DDR-SDRAM (DDRRAM)
Bus Speed: 533 MHz
Cache Size: 2 MB
System Chipset: Intel 915GM Express
Drive Controllers: IDE (ATA/EIDE/ATAPI)
Interface Type: Audio - Line In (1/8" Mini), Audio - Line Out (1/8" Mini), Ethernet - RJ45 Twisted-Pair (XBaseT), IEEE 1394 - 4 pin Unpowered, Parallel - 25 pin D-shell (IEEE 1284A), Port Replicator (Proprietary), Serial - RJ11 Modular (Phone/Telco), USB - Universal Serial Bus 2.0, Video - 15 pin High-Density D-shell (VGA)
Slots: Memory Stick PRO, Memory Stick PRO Duo, Sony Memory Stick, Type I CardBus, Type II CardBus
Display Size: 15.4 in
Aspect Ratio: 16:10
Display Type: LCD Display w/ XBRITE Technology
Resolution: 1280 x 800
Video Integration: Motherboard
Shared Video Memory: 128 MB
Video Chipset: Intel Graphics Media Accelerator 900
Included Drives: DVD±RW Dual Layer Combination Drive, Hard Drive
Hard Drive Capacity: 80 GB
CD Write Speed: 24 X (CD,CD-R)
CD Rewrite Speed: 10 X (CD,CD-R)
CD-ROM Read Speed: 24 X (CD,CD-R)
DVD Write Speed: 8 X (DVD, DVD-R)
DVD Rewrite Speed: 4 X (DVD, DVD-R)
DVD+R DL Speed: 2.4 X (DVD, DVD-R)
DVD-ROM Read Speed: 8 X (DVD, DVD-R)
Input Devices: Keyboard, Touchpad
Included Network Card: Ethernet (10/100 Mbps), Wireless Ethernet - 11 Mbps IEEE802.11b, Wireless Ethernet - 54 Mbps IEEE802.11g
Included Devices: Modem, Wireless LAN Antenna
Battery Life: 5.5 hour(s)
Operating System: Microsoft Windows XP
Altura: 3.5 cm
Largura: 34.3 cm
Profundidade: 24.4 cm
Peso: 2.28 kg
Warranty Information: 1 Year Limited Warranty
Valor:[size=9] R$ 4.690,00 divido em 6x de R$ 890,00.[/size]
Até.