OMG, is that still tossing at the feature request page to be decided to make its way in/not......!
I was thinking I don't know how to add filters and later I was about to replicate adding filters for other fields like location, specs, cylinders, model years etc for my car classifieds.
I think this adding filters should be very basic functionality to find a needle in the haystack, as that's what supposed to be the prime function of any classifieds that has thousands of adverts.