Nubee Store via eBay offers the Volmate Fingertip Pulse Oximeter in Blue or White, model no. VOL60A, for $11.99 with free shipping. That's tied with our mention from three weeks ago and the lowest total price we could find by $3. This clip-on device measures blood oxygen saturation and pulse. Deal ends May 10.

Note: This expiry date applies for the blue oximeter. The white model's price will expire May 6 at 6 pm ET.