Keep in mind also that there are different laws. In the UK, for instance, it's a statutory right to return goods for any reason as long as they are unused and undamaged. Of course, some vendors try to obstruct this with their own "policies" or offering vouchers instead of refunds, or trying to insist that once a package is opened it can't be returned. But all will have the disclaimer "your statutory rights are unaffected" underneath their "policy" statement. Meaning it's worth arguing for you consumer rights.
Even stores that traditionally had a no questions asked return policy are moving away from this now and unfortunately, very few people know their statutory rights