Looking for value direct electronics

RFQ Description

I want to order this notebook: http://www.amazon.com/dp/B00K9VMPXKbut there are different information about Ram. In the name of product is 4 GB but in the description 8GB. Also hard drive is described differently, first 320 and than 250 - for me important is that it is 7200rpm. I want this product because of very good specifications:- Intel® Quad CoreTM i7 740QM 1.73GHz processor- 8GB DDR3 ram memory,- 250GB 7200rpm SATA hard drive,- NVIDIA® Quadro FX 1800M- Windows 7 Professional 64-bit - 9-cell batteryand the price 300 poundsAnd I want to have this product with these parameters for this price.I know it is used but also refurbished I suppose.Could you tell me how old is this specific notebook and what is/was broken or what was the reason of come back to seller and what was repaired before puting it on sales again?I just want to be shure about above informations given in the description.My contact email is *@********************hone number: ******Dell Precision M4500 Intel Quad i7 1.73Ghz 8GB RAM 250GB HDD DVDRW 15.6 HD 1920x1080 Nvidia 1GB Video Windows 7 Professional 64-bit Operating System Microsoft Office Starter (include Word and Excel). Office Starter is not trial software - you can continue to use it as long as you need. Laptop does not have integrated Web Camera CPU: Intel® Quad CoreTM i7 740QM 1.73GHz Processor RAM Memory: 8GB DDR3 Hard Drive: 250GB 7200rpm SATA Operating System: Microsoft Windows 7 Professional 64-bit Video Card: NVIDIA® Quadro FX 1800M Graphics with 1GB dedicated memory Display: 15.6 1920x1080 HD Ultra Sharp Anti-Glare LED Display Optical Drive: DVDRW Connectivity: Wired: 10/100/1000 Gigabit Ethernet network interface adaptor Wireless: Dell Wireless (802.11a/b/g/n) Battery: 9-cell battery Weight & Dimensions: Starting weight: 2.73 kg/6.0 lbs (with 6-cell battery) Width: 374mm/ 14.72 Height: (front/back) 29.1-36.1mm/ 1.15-1.42 Depth: 253mm/ 9.96 Ports: 1394 4-pin, USB 2.0(x4), VGA, Display Port, RJ-45, Audio, eSATA Slot: 8-in-1 card reader; ExpressCard 34; PC Card