We need advice on server purchase. We currently have an old HP server (5 yrs.) that is acting as domain controller, dns server, and MS Sql database server. We have as many as 6 users logged in at any one time--most of the time three to four. We are running Windows 2000 server. We want to add another server and move the database to it. The database is the back end for our accounting application. The front end resides on each users workstation. To save money, we are considering a used server. My questions are what are specs to get good performance from database server, will we be better off keeping old server as domain controller and with new server is there appreciable difference between SCSI and SATA drives? Also, is buying used bad idea?