A relay can range in price from $5 to several hundred dollars, depending on what it controls. Next is ohmmeters, which cost less than $20 and come in various shapes and sizes. Next, high-impedance test lamps are slightly more expensive, costing between $20 and $40 on average. Finally, jumper wires are inexpensive, ranging from $2 to more than $50 depending on the wire's length.