^huh?
anyway..
if the issue is immediate finances, i agree w kat in that you should sell the black first, cos they're very easy to find and you can get another down the track.
if the issue is redundancy... then i say sell either the sky blue city or the lilac twiggy, cos they're similar looks (pastels..)
or, look at which one you actually use the least, regardless of how much you love it.. that's the one that you should sell.
(i believe the rouge city is new leather)