You're going to pay a little more, but the best breadboards (and I've tried bunches) are the Global Specialties brand and second best are the E & L Electronics brand. Both are under the corporate umbrella of Interplex Electronics. Both of these brands have UNLIMITED LIFETIME WARRANTIES on their breadboards. If they fail for any reason ... even if you spring the contacts, melt them down from overdissipated resistors or reversed power on ICs or they simple are so old that they're worn ... they will replace them at no charge. The warranty was a wonderful thing in the school where I taught where the boards got a lot of rough use and Interplex Electronics replaced them, no questions asked, time and time again. All you pay for is the return postage to get them to Interplex.
I avoid any Asian boards like the plague. Yeah, they're cheap. But I've never seen any that were reliable or weren't intermittent. I hate 'em.
Dean