Many years ago I had a similar scenario with a local dealer. I had bought a lot of gear from this guy..always at full retail. One day I walked into his store and was looking at a couple of records. His sales person asks me if I am going to keep looking at the records or am i going to be buying something; he then tells me if I am not buying something to get out of the store! With that, i ask for the manager/owner...whom i had always bought from. I get the same basic response from this guy...buy or leave! So, guess what, i left and never came back. After a few years, the dealer went into insolvency and closed his doors. For some reason, I get some pleasure out of that.
If I were the OP, I would take the amp, resell it for whatever I could get for it...and make sure that I never dealt with this dealer again...and made sure that all in my sphere did exactly the same thing.
If I were the OP, I would take the amp, resell it for whatever I could get for it...and make sure that I never dealt with this dealer again...and made sure that all in my sphere did exactly the same thing.