There are some great deals available on analog chess clocks these days. My advice is DO NOT BUY AN ANALOG CLOCK no matter how good a deal it might be. The reason is that these clocks are gradually being phased out of chess competition in favor of digital clocks so you might end up with a clock you will be unable to use. If you are going to buy a clock, buy a digital!
Further, after you buy your digital clock, pay some 10 year old kid $20 to teach you how to program it.