I found this in my archives. It's a mock of a new search UI (created while I was Head of Marketplace at CARS.com). It never saw the light of day but I still like the concept 
User story: I know the YMM of what I'd like to buy, I have some fav features, but IDK much about the trims.
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The mock attempts to display the trim hierarchy and help the shopper visualize, as you move up or down the trim list, display what changes. The shopper picks their favorite trims and clicks submit....
Result:
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A new search UX
My mission was to get creative and think of new and unique search experiences. My design goal was to assist the power user. This mock would be easy to Improve by adding price filters (i.e. under $xx,xxx) , add deal bucket filters. Then to stimulate repeat use, add new arrival filters (i.s. VINs you haven't seen yet), price changes since your last visit and 'likely to sell soon'.
p.s. inspired by the Kayak 'multi-date' power shopper Grid UI...
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It was a 1st draft, be nice to me hahaha
