One more feature request, but more so for the "history" site. The ability to multi-select options in the dropdown. So for example, if I want to see what similar cars were listed for in the history site, it's very hard to do because I can't multi-select, for example, year, interior type, wheel type, color, trim type to make an exact comparison.
On the regular site, it's not that big of a deal because I can use the "alert" page, which I can then be very specific about those criteria.
The alternative could be to simply do a similar page like the "alert" page, except it performs the search criteria in your "history" site instead of the regular site.
Or another alternative is to make it where the "alert" page has an additional option to search "regular", "history", or both. If both is selected, when you click to get your search results, there's an additional column that you can filter by "current" or "history".