What is today's value for a Mac OS X 2.5 GHz with Intel Core 2 Duo and 4GB memory with 667 MHz DDR2 SDRAM?

What type of Mac is this?

There is no such thing as OSX 2.5, so what is it really?

This information will affect my ability to estimate a price

There are no 2.5Ghz MacBooks. 2.4Ghz is the fastest made. Here's a list of every MacBook at Everymac.com http://www.everymac.com/systems/apple/macbook/index-macbook.html

The best way to check on used prices is to keep watching eBay http://computers.shop.ebay.com/Apple-Laptops-Notebooks-/111422/i.html?Product%25 20Family=MacBook&Processor%2520Type=Core%25202%2520Duo&Memory%2520%2528RAM%2529= 512%2520MB%2520or%2520more&Hard%2520Drive%2520Capacity=60%2520GB%2520or%2520more &LH_ItemCondition=3000&Processor%2520Speed%2520%2528per%2520Core%2529=2%252E4%25 20GHz%2520or%2520more&_nkw=13.3%20apple%20macbook&rt=nc&_catref=1&_dmpt=Apple_La ptops&_npmv=3&_sc=1&_sop=1&_trksid=p3286.c0.m282

As to RAM, not all MacBooks use 667mhz RAM and not all can handle 4gb. Any 2.4Ghz MacBook can though.

1,1 (Early 2006) can handle 2gb of 667mhz PC2-5300 RAM
2,1 (Late 2006 & Mid 2007) can handle 3gb of 667mhz PC2-5300 RAM
3,1 (Late 2007) can handle 4gb of 667mhz PC2-5300 RAM
4,1 (Early 2008) can handle 6gb of 667mhz PC2-5300 RAM
5,1 (Late 2008, Aluminum Unibody) can handle 8gb of 1066mhz PC3-8500 RAM
5,2 (Early 2009, 2.0GHzModel Only) can handle 6gb of 667mhz PC2-5300 RAM
5,2 (Mid 2009, 2.13GHzModel Only) can handle 6gb of 800mhz PC2-6400 RAM
6,1 (Late 2009, White Unibody) can handle 8gb of 1066mhz PC3-8500 RAM
7,1 (Mid 2010, White Unibody) can handle 8gb of 1066mhz PC3-8500 RAM

Mac Newbie 13 wrote:

I want to buy the above machine second hand, what is the value?

Search eBay and see what they're going for

When you are sure what model and specs you have in front of you use this to calculate the value...http://www.mac2sell.net/