Amazon offers Prime members the Scosche MagicMount Magnetic Dash Mount, model no. MAGDMB, for $8.32 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, it adds $6.03.) That's the lowest total price we could find by $2. It uses high-powered magnets to secure your GPS, iPod, iPhone, iPad, smartphone, or tablet.
Walmart charges the same via in-store pickup.