Very nice. Used it to research upcoming purchase quickly, would have signed up to persist saved results if you had that option.
Main feedback - browser refresh, back/forward, tabs, middle-click should work, e.g.
- refresh now loses half the state (why half?)
- opening 'Click to view listing' messes up state (loses saved)
- want to be able to middle click on 'Details' to open in new tab
Nice to have: integration with Edmunds to appraise the car