If you bring it back all sealed up so it is still new then they usually
will refund your purchase price if you bring it back within 14 to 30
days depending on the item. You need to check with the store's policy.
If the item is sold "as is" then it was sold at a discount and that's
why you chose to buy it at a cheaper price. If you bring it back
opened, you bring back **USED** merchandise which not only incurs
restocking expenses to the seller but they also cannot sell it at the
new price (you've seen those "out of box" discounted items, too).
It is also to discourage illegal use of the item. Best Buy had lots of
folks buying the GoVideo dual decks (rather than get 2 separate decks
and a signal conditioner between) to make illegal copies of movies to
hike up their collection and then return the item "because they didn't
want it anymore". The restocking fee offsets the theft savings that the
customer might've made in using the item during the time that they had
it. Yeah, go buy a big screen TV, have a party to watch the superbowl,
and then return the TV? Well, just consider the restocking fee a rental
charge. You had it for use for a time that the seller didn't have it to
sell.