I actually like the way your car currently looks. It's cleanly executed but different from what I usually see. If you really want to go for the more stock look (and peoples' tastes change so I can understand) and the cash you're being offered is good, I'd say to go ahead and make the change. The CTR stuff is neat looking and I think that kit resale value isn't all that great so such deals might be few and far between. In any case, good luck with your decision and keep us posted.
Oh, and if you take new pics, make sure your camera's white balance is set correctly next time.

h: