Be sure to read the store's return and exchange policy before purchasing any items, as they may not be returnable once shipped or opened.
Discontinued boots that are available at bargain prices are less likely to be returnable or even exchangeable, and since the Konas have sizing issues, you may find you have a boot you'll have to sell in turn.
Just be sure to check with each store's return policy, as most lingerie may not be returnable after it is opened, mainly due to sanitary reasons..
You may be required to purchase a start-up kit; find out if it is returnable within a certain amount of days should you change your mind.
Since mattresses are generally big investments, make sure yours comes with a warranty and is returnable within a few weeks.