Selling diabetes test strips for cash is not illegal, but it operates in a gray area. Companies that buy and sell these strips are supposed to register with the FDA, but many do not. This creates a market where people with diabetes can sell their excess strips for cash, often to uninsured or underinsured individuals who need them at a lower cost. However, there are risks involved. The quality and integrity of these strips can be compromised if they are expired, exposed to heat, or not stored properly. Healthcare professionals advise caution and suggest that patients explore other resources like prescription savings programs or assistance from healthcare providers before resorting to buying or selling test strips in this manner.