Yes. I would never even consider buying empty bottles! If you buy bottles, you might as well buy them with beer in them. Just make sure you rinse them out before you store them. Also, you have to use pop-top style. Twist off won't work well.
Anyone have a good way of cleaning used commercial bottles?
yes.
-Rinse the bottle when you are done with it
-on bottling day
-wash all bottles with hot water and a bottle brush if you suspect the bottle is DIRTY
-mix up a solution of starsan or your favorite sanitizer. Sanitize the bottles by dunking them in and swishing sanitizer around then draining.
-I like to use my dishwaser rack to dry the bottles. Spray down the rack with sanitizer and fill the rack with sanitized bottles.
-If using starsan, don't let the bottles dry. Starsan is a WET sanitizer. It will only work when the bottle or object to be sanitized is WET!
-If I know my bottles are CLEAN (no mold or crud in the bottom) I put them in the dishwaser on heated dry. Instant sanitation.
Some people like to remove the labels. I'm usually too lazy. If you want to, soaking in a weak starsan solution will get the label right off.