I need an advice about injectors

Hi guys!, i´m thinking of replacing the injectors of my ZX since three of them are leaking and I suppose the rest of them are gonna leak soon. My Nissan dealer has no injectors in stock so I´m thinking in rebuild‘em or purchase’em from ebay, which is cheaper than rebuild, the cost of the 6 injectors may reach about 120 US$ with handling and shipping, and I think is time to do it due to the Colombian Peso is becoming stronger ( but not my wallet). I wonder if you guys have had some experiences with the rebuilt injectors from ebay , should I take the risk and buy them?

thanks guys