"Four capacitors, three resistors, one germanium transistor, plus a boost pot, two jacks, a switch, and a battery, and there you have it – the most vaunted and most valuable effects unit ever created! But as with so many collectibles, complexity isn’t necessarily an indicator of value ($825,000 for a 1918 “inverted Jenny” postage stamp anyone?), and the Rangemaster has several blue-chip factors in its camp. For one, original examples are very rare; two, Eric Clapton, Brian May, and Tony Iommi used one; three, this simple box of bits does something absolutely luscious to your tone."