Ending today at 11 am ET, ToolSmithDirect via eBay offers the Powerbuilt Vehicle A/C Fluid Fluorescent Leak Detection Kit, model no. 648416, for $14.99 with free shipping. That's the lowest price we could find by $5. It's designed to "pinpoint fluid leaks in AC, oil, coolant, fuel, ATF, power steering, and hydraulic systems".