I've had my Hiper Industries for over 5 month's now with no problems, wires and everything are still intact and these are the high wattage ones too, they're like 85watts or something...look for some of these, i think they are the best looking and performing "wannabe" HID's out there, i've heard nokya's are good also. Stay away from PIAA's they suck bad.
Do have any idea who makes the ones you were looking at on e-bay? I think I saw some Hiper Industries there one time