I think the OP and the dealer both made the right move for themselves. As detailed above there is much work and risk involved in doing an at home demo for expensive large loudspeakers. The buyer had a less costly alternative with the option to return if he so decided. Either party could be second guessed, but if they were to start over again I think they would still make the same decision.
Not everybody is going to get an at home demo. The answer for a valued long term customers will be different than for just anybody walking in off the street.