Who can help me to see how much this notebook configuration can cost?

You can simply see the configuration of this computer property.

Lenovo G450A-PSE(H) Core 2 dual-core P7450, 2G memory, 320G hard disk, 5 12M low-end discrete graphics card, Beijing offer 5000;

Lenovo G450A-TSI(H)/(D) Constellation Edition /(H) Fashion Core 2 dual-core T6600, 2G memory, 320G hard disk, 5 12M low-end discrete graphics card, Beijing offer 4600/4700/4800;

Lenovo G450A-TFO(W) Pentium dual-core T4300, 2G memory, 320G hard disk, 5 12M low-end discrete graphics card, Beijing offer 4250;

Lenovo G450A-TFO(S) constellation Pentium dual-core T4300, 2G memory, 250G hard disk, 5 12M low-end discrete graphics card, Beijing offer 4200;

Compare yourself.

Lenovo G450M-TFO Pentium dual-core T4300, 1G memory, 250G hard disk, X4500 integrated graphics card, Beijing offer 3600;

Lenovo G450L-TFO Pentium dual-core T4400, 1G memory, 250G hard disk, X4500 integrated graphics card, Beijing offer 3399;

Lenovo G450A-TFO(H) Fashion Pentium dual-core T4300, 2G memory, 250G hard disk, 5 12M low-end discrete graphics card, Beijing offer 4200;

Lenovo G450A-TFO(D) Fashion Pentium dual-core T4400, 2G memory, 320G hard disk, 5 12M low-end discrete graphics card, Beijing offer 4300;

Lenovo G450A-TON(S) constellation Celeron dual-core T 1600, 1G memory, 160G hard disk, 5 12M low-end discrete graphics card, Beijing offer 3599;