Not a one to blithely clarify any statement you make, but in this case I think it is justified: "new one with a warranty, of course the initial cost will be higher." Just sayin'...I’m not aware of any counterfeit Subway amps. Like any used amp, be sure everything operates correctly.
If you are concerned about buying a used amp, the alternative is to buy a new one with a warranty, of course the cost will be higher.
BBB