You may want to point out that any HID kit lights from Alpine (any color temp) will work with your kit. It's a simple matter to switch out the bulbs. And with a little bit of DIY, any HID bulb from ANY kit can be made to work with this kit, just requires a little snip snip and soldering. Alpine sells extra sets of bulbs for like 20 bucks, so people that buy this aren't restricted to just the yellow. That may be why nobody's buying your set yet. Setup is also pretty easy if this includes the predrilled headlight caps, you just run the wires along the edge of the engine bay to the battery terminals.
BTW, I have yellow and white. The yellow is a little brighter running on the same current, because of the lower color temperature.
Good luck with the sale! Free bump!