Ocean Technology via Amazon offers the Unitek Gold-Plated Mini DisplayPort to VGA Adapter, model no. LYSB00Z6TES7G-CMPTRACCS, for $9.96. Coupon code "CNYZNEXP" cuts that to $4.98. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.02.) That's $25 off list and the lowest total price we could find. It's also Thunderbolt 2 compatible.