I second Elizabeth's comment that this is the best site. I have had mixed results with eBay, some great and some not so great. I have owned a Hafler DH-200 amp and DH101 preamp for twenty years and agree that the DH200 would be a good entry level amp, particularly if he already has Hafler preamp. I am considering putting mine on the block since I switched to home theater setup, but can't quite seem to let it go. There is one for sale here on Audiogon and one on eBay. I typically see them go for $150 to $200. E-mail me if you want more specific information. Good luck and good listening!