I own a HiFi store and I routinely offer upgrades at very generous terms (including full value). Any audio shop that considers itself "high-end" should do this as a matter of course--not because it has a policy per se, but because good audio retailers should seek to establish mutually beneficial long-term relationships with their customers. The reason many audiophiles still choose to purchase from a brick-and-mortar store is because of this special relationship. That's why I lend stuff out and allow my customers to "try-before-they-buy," too. It's with services like this that online retailers can't compete.
