Selling my MacbookPro A1278

I have a 2010 MacbookPro that I am trying to sell. The model number is A 1278. I entered the computer details onto Gadget Value and the approximate asking price I received was $885-$921. Details listed below.

Manufacturer – Apple Macbook Pro
Year – 2010
RAM – 4GB
CD Drive – DVD DL RW
Processor Speed – 2.4 GHz – 2.7 GHz
HDD – 500GB
Processor – Intel – Core i7 (Nov2008)
Graphics Card – 256 MB
Features
– Webcam
– Bluetooth
– HDMI
Screen Size – 12″ to 16″
Battery Condition – Good
Screen Condition – Good
Other Parts (Keyboard /Mouse) Condition – Working
Remaining Warranty Period – Expired
Price range : $885 to $921

My neighbor who is a good friend of mine and knows much more about computers as he is in the industry is interested in buying it. I offered it to him for $700. He clearly indicated that he thought $700 was too much and said he was more interested in paying $500-$600 dollars. Money and friends. I have looked at other websites and have gotten anything between $550 to $1200, but Gadget Value had me enter in what I found to be the most relevant information. What is a good price?

I just called apple support and I figured out why my information does not fit together. The bottom of my laptop says 2010 model when the support team says it is a 2011. So I do have HDMI and an Intel i7 Core of 2.7 Ghz. I fixed the info about the CD Drive to CD R CD RW also.

Manufacturer – Apple Macbook Pro
Year – 2011
RAM – 4GB
CD Drive – CD R CD RW
Processor Speed – 2.4 GHz – 2.7 GHz
HDD – 500GB
Processor – Intel – Core i7 Extreme (Mar2010)
Graphics Card – 256 MB
Features – Webcam
– Bluetooth
– HDMI
Screen Size – 12″ to 16″
Battery Condition – Good
Screen Condition – Good
Other Parts (Keyboard /Mouse) Condition – Working
Remaining Warranty Period – Expired
Price range : $1207 to $1256