For personal use? The Champion Easybird traps are about the best consumer grade traps on the market. Good, reliable electric traps that run off a deep cycle car battery. You can use a wired or wireless remote. Oscillating and wobble bases are available to keep the targets changing. You can get them with a single turret, or a 6 turret model that will hold 150 targets. You're looking at around $450 and up, depending on which model and what accessories you want to add.
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The Promatic Rangers mentioned above are fantastic, but they're really a commercial unit. They start at $2,600 and go up from there. They're much heavier duty traps, than the Champion units and are overkill for most casual shooters. They take a few minutes to adjust the throwing position, and the wobble traps are about twice as much as the Ranger. The Rangers are really designed to be used to set up a complete 5 stand or sporting clays course that will remain put for several days or more.
Promatic makes a hobby model that's under $1,000, but I don't know much about it, personally.