I have been looking for a used laptop for about a month and I keep seeing Macbooks from 2006 up for sale. My question is how do they hold up for five or more years, have you noticed any problems with them after a certain time frame? I know that batteries tend to wear out after awhile, but I'm willing to replace that. In addition, I am new to Mac's and would be using it primarily for college work. Things like browsing the web and typing papers are on that list.