Dan, Jim from DC collects that combination and would jump all over that note graded or not.
I would slab it if I were going to put it on ebay but not if I was going to sell it to a knowledgable private buyer. We could work it out and know the condition is accurate. I have paid as much as 200 for a 20 on ebay normal auction style. Then I have picked up some notes for 2 or 3 times face so as normal timing is everything on ebay!
I have taken about a year off of buying 656 notes on ebay so I really do not know how much the market for these has soffened but recently pennywise pointed out anther 656 note to me and in a normal auction style it closed much higher than I would want to pay. Maybe fancy note collectors are plum crazy but at least I know I am not the only one.