I sold mine for £1400 guy heard it in my home, I took a deposit and loaned him it for 2 weeks no obligation and he kept it, I was happy and so was he again what price for that, money takes no account for sound, I paid £3500 for a hovland saphire, it was crap to my ears in my system, the Unisis would see it off all day long, so is the Unisis worth3.5 k? All depends what you want and with a dealer you probably get some sort of warranty.
i would pay that if I wanted one, but if you can get one cheaper especially the sig, then buy it. It's a cracker.