You may need to put less of a priority on something silver faced. Most often it would command a premium if for no other reason than it's silver.
Two pre's that I've had great experiences with are NAD (1020 & Monitor 1000) and Hafler DH101. Both sounded excellent to me. So much so that I sought out another Monitor 1000 and kept the DH101 when I did a bit of a pre-amp purge. I removed an APT Holman from the system to lubricate it's input selector and have not bothered yet to take out the DH101 I put in it's place.
Both Hafler and NAD were "darlings" in their day so lots were sold, therefore not too hard to come by. More in/out jacks on the Hafler and both have tone controls. Neither have a loudness switch - tone controls accomplish the same thing. Both sound very good (in my opinion) with a WOPL and neither have stepped volume controls. That can be a distinct advantage with that much power on tap.
Since I am too poor to pay attention, any audio I get must be at the low end of the price spectrum. And they usually need things done to them.
As example:
https://www.ebay.com/itm/NICE-VINTA...793561?hash=item3af7297959:g:6M0AAOSwIFtaB-EK