Didn't want to test your knowledge in anyway but simply wanted to make it clear about the memory upgrade difference for LouisaClare.
Here is the main point for my suggestion:
- Owner of a laptop don't want to get only 4 Gg of RAM. 8 Gb is minimum to support 4-5 year of OS and softwares.
- HHD is nearly dead in term of main storage of any device. SSD simply make thing fly and will ensure proper performance for many years to come.
- Buyer is not affraid of refurbished.
Here is the options I see on Apple.com:
Refurb Macbook Air 13" - 2012 - 128 SSD - 4 RAM (Not upgradable) at 849$
New Macbook Air 13" - 2013 - 128 SSD - 8 RAM memory upgrade at 1199$
Refurb Macbook Pro 13" - 2012 - HHD - 4 RAM at 999$ (300$+ upgrade SSD/RAM)
Refurb Macbook Pro 15" - 2012 - HHD - 4 RAM at 1449$ (300$+ upgrade SSD/RAM)
Refurb Macbook Pro Retina 15" - 256 SSD - 8 RAM at 1599$
For me regular Macbook Pro simply doesn't cut it there in term of size, speed and features. I would either go all out for the 15" retina with dedicated graphic card, real quad core and 256 SSD or get the Macbook Air 13" with 8 Gb of RAM. Don't get me wrong, 4 Gb of RAM and a regular 5400RPM harddisk is not future proof for someone that want to use it of 4-5 years. So here are my two recommendation:
New Macbook Air 13" - 2013 - 128 SSD - 8 RAM memory upgrade at 1199$
Refurbished Macbook Pro Retina 15" - 256 SSD - 8 RAM at 1599$