Sunvalleytek via Amazon offers the RavPower Qi-Enabled Wireless Charging Pad in White, model no. RP-WCN7, for $29.99. Coupon code "JKSIH4QR" cuts it to $19.99. Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.42.) That's $50 off list and the lowest total price we could find. It's compatible with most Qi-enabled devices and features an LED charging status indicator and AC adapter.