Usher Pre-Amp and Usher R2.5 what are they worth??


i have a chance to buy some used Usher pre and amp.  I can not find much info on these.  Any help would be appreciated...i need to know what I should be paying used (amp is a bit scratched up on front)
Usher R2.5 250wpc class AUsher P-370 pre/pro

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please if anyone has any info i would really appreciate it.  looking at buying these locally but....they are NOT cheap
I don’t know what retail was on these. Pre/Pro items depreciate like crazy, the amp has a scratch on the face, not that many were sold so they were not very popular. So I would not pay more than that.
The usher preamp is not a processor. For $2,000 CAD that is a LOT of bang for your buck. The preamp is still a current model that sells for over $2,000 US. 
Usher Pre-Amp and Usher R2.5 what are they worth??
The R2.5 is worth around the same as a much older Threshold S300 that it was copied after. The pre about the same if it's a copy also of a Threshold pre.

Cheers George