Oxygen Concentrator Store from American Medical Sales and Rentals has been the leader in oxygen therapy since 2001 and we offer the highest quality brands of home and portable oxygen concentrators. We have the backing of the Better Business Bureau which means you can have complete trust in our selection, our competitive pricing, our service and our warranties. We offer the lowest guaranteed prices, so low that some of our suppliers will not allow us to publish our pricing on the internet. We now offer the highest quality CPAP and BiPAP machines that can be used for Sleep Therapy. DeVilbiss, ResMed and Respironics provide excellence in patient comfort, reliability and affordability for our patients who require assistance during sleep.