I've posted before for T60 laptop at 14" or 15". Current price at eBay is 300 to 350 each including everything. T series is professional grade machine, solid like rock.
Find this seller: http://cgi.ebay.com/IBM-Lenovo-ThinkPad-T60-with-Docking-Station-NY_W0QQitemZ220572650219QQcmdZViewItemQQptZLaptops_Nov05?hash=item335b278aeb
that particular machine is not the best in their fleet.