Pyle-Pro Moving Coil Dynamic Microphone for $9 + free shipping via Prime
Amazon offers its Prime members the Pyle-Pro Moving Coil Dynamic Handheld Microphone, model no. PDMIC58, for $8.50 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, shipping adds $6.18.) That's the lowest total price we could find by $3. It includes a 15-foot 5.5mm microphone cable and XLR input.