Filter by price discount

[calvinize]

I hope I'm using this correctly.

It would be nice if the user can set a filter to only show items that are discounted over a certain amount (the percentage difference between the crossed-out price and the current selling price). For example, if the new price of the item is ¥10,000 and the pre-owned one is sold at ¥7,000 then it's at 30% discount.

Sometimes you just want to hunt for figures at a good deal :P