This year left me a little cold compared to the last two years. None of the big props really do it for me. However, I do think the live wires is a pretty neat prop. Its probably the only one I'll pick up this year. Especially if pair with a flash cracker I can see this one getting some good scares.
If you're handy, sure, you could make it, but if you don't already have the bits and pieces lying around, they're going to cost enough to make it questionable whether it's worth you time. It costs over a buck a foot to get small lengths of custom-cut wire loom around here. I'd have half the cost of the prop in that alone...wire, LED's, battery compartment, heat shrink tube or a dab of solder, trigger switch -- not very expensive nor difficult to manage, but they add up. Where I'd be in trouble is installing a mechanism to make it jump and twitch realistically. Kudos to you if you could do it easily. I couldn't.you know how easy it would be to make this..... you could always download the shock effect and puts some LED lights inside wire loom=)