My local dealers let me have anything I wanted for two weeks. I auditioned a pair of speakers, complete set of cables and a power conditioner for two weeks completely free of charge. So id you ask what the standard is, different dealers will for sure have different standards.
Fee for home audition
I am in the market for a music server/streamer. I was discussing with one of the authorized dealers for a streamer. He had a demo unit and was willing to bring to my home for an hour and let me try. He is located around 10-15 minutes from my home. He wants to charge 5% for home demo. Is this the industry standard? I am not meaning to disparage anyone so not going to name the dealer. I am just trying to see what the standard practice is.