Groupon offers the Pyle Premier Series Professional UHF Wireless Handheld Microphone System, model no. PYLPDWM1902B, for $59.99 with free shipping. That's the lowest total price we could find by $30, excluding the mention below. It features eight channels, 164-foot range, and 1/4" and XLR jacks.
A close price: Walmart offers it for $60.90 with free shipping.