Acer Aspire 5742 z

i bought it from Bcs computer city.almost 1 year.i am use it only my home and normal use.it's now very good condition.i want to purches a new one for this i want to sell it.
Operating System1 Genuine Windows® 7 Home Premium 64-bit2
Genuine Windows® 7 Home Basic 64-bit2
CPU and chipset
Intel® Pentium® processor P6100/P6200 (3 MB L3 cache, 2/2.13 GHz, DDR3 1066 MHz, 35 W), supporting Intel® 64 architecture, Intel® Smart Cache

Display
15.6" HD 1366 x 768 pixel resolution, high-brightness (200-nit) Acer CineCrystal™ TFT LCD
16:9 aspect ratio

Graphics Intel® HD Graphics with 128 MB of dedicated system memory, supporting Microsoft® DirectX® 10

HDD : 320 GB
External Drive : 8 GB

RAM : 3 GB DDR3

Used : 12 Month.
pn:01670251167,01673710768