Add filters for price and stock

[noonien]

There are times when the search yields a lot of results, it would be very helpful to be able to filter them by price and stock, to help make choosing easier.

[Luxtech]

Yes it would be awesome if you can specify a price range, to filter out expensive and or cheap parts (can parts be too cheap... No! :) )

Currently you can sort by price but this makes it impossible to sort by another category.