Find another dealer. There are lots of other options out there. Before I bought an integrated from Linear Tube Audio, I tested all three of their integrated amps in my house, with no charge or deposit. Same with a Naim Uniti Atom, HiFi Rose 150b, Merason DAC1, Backert Labs Rhumba Extreme, Ideon Iyazi, NAD M33, Technics SU-R1000, and Matrix Audio M2--which represent four different dealers and none of whom charged for an in-house audition. When all else fails you can pay for the unit with an online vendor and take advantage of their 30 or 60-day return period. Audio Advice and Crutchfield are two who do it with no hassle returns.
Dump Mr. 5%.