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I hope this message finds you well. I'm inquiring about an oxygen concentrator that my mom previously used in a nursing home. We really appreciated how quiet and efficient it was, and I've noticed that your company carries this model. I would love to know the pricing for this product, along with any available options or features that might be relevant. It's important for us to find the right unit, so if you could provide detailed information regarding costs, shipping, and any warranty options available, that would be fantastic. I look forward to your prompt response, as we are eager to process this purchase soon. Thank you!