Add ability to sort your own collection by different grade levels

It would be a nice feature if I would sort my own collection by different grades. Currently, I can only sort by ungraded value/actual value (i.e. if a card is already graded). It would be a very nice feature if I could sort by PSA10 value, or PSA9 (any value actually) so I can see what cards I should send out for grading. For example, I might have a card that lists ungraded for $1.25, and $10,000 for a PSA10. I have no idea if I should consider that card for grading because I would never see it at the top of my value list.