well. the new ones are the ones I use all the time.
I know it seems odd to some but I have a dozen computers running different operating systems and combinations of software and hardware. Some for specific purposes. One is used exclusively to convert outlook express files to office outlook 2003 so they can be imported into office outlook 2007 and 2010. It also converts old pagmaker docs from mac versions to windows versions and imports them to office.
The rest are similarly occupied or setup on the shelf for when a particular combo is needed.
I am building another network file server now to replace an aging one which will free up some p4 desktops to give away.
I get repairable laptops or laptops that are obsolete by todays standards fairly often but I usually have someone on public assistance or unemployed ready to take them.
I have a rather large pile of dead laptops I rob parts from.
If you like I will watch craigs list for a few weeks and watch for good quality used laptops (or dead ones I have working parts for).
Is your budget still 50 to 150? Do you prefer pc or mac.