SkyBlue.com is a cash business, and therefore the only way to pay for items is with a credit or debit card. You can download an invoice from within Your Account and submit that invoice for reimbursement from Medicare, Medicaid or your insurance company. The item may or may not be eligible, depending on your plan and individual circumstances.
If you have a prescription for an item, you will want to find a licensed DME (Durable Medical Equipment) Provider who can take your prescription and directly bill your insurance company.
Downloading an Invoice from SkyBlue.com: