Looking for an used, inexpensive pre amp


Currently using a cheap but fairly nice sounding Dayton T120 D class amp.  Not enough inputs.  I would like to find a pre amp to use with this amp and perhaps at some point, if I can find the money, I can buy a power amplifier to replace the Dayton.

Figure my budget to be under $200 right now.  Looks like plenty of older inexpensive Solid State pre amps are available on Ebay.  

Any ideas what I should look for when buying a preamp?  I've only used Integrated amplifiers up to this point.  
will62
Post removed 
A Sumo Athena can be had for $200 to $300.  It is better than any Adcom other than the GFP-750... You could find an Old B&K for that price or as mentioned above,  a decent passive could be found in that price range.

I suspect,  this sounds pretty good.  I'm familiar with this volume controller.
http://www.ebay.com/itm/NEW-PGA2311-Stero-Remote-Volume-Controller-audio-Preamp-pre-amplifier-with-MUTE-/141447354247?hash=item20eeeb5787:m:mcHZDPREyeAV4jRgjH4f4FA
I did not like the SYS 2-input passive and returned it.  To be fair I auditioned it against a tube pre-amp 
$200 will not buy much unless you find a desperate  or ignorant seller. An Amber FF-17 is a decent vintage preamp (owned one in the mid 80's) that might go for $200? A Yamaha CX-1 , Sony E80/90ES or Proceed PRE are very nice newer preamps that could go for around $500.