My best redemption was 2 saver reward International C for my honeymoon.
MIA-FRA-MAN / MAN-MUC-IAD-TUL
Cost of ticket currently stands at $6,200 x 2 = $12,400. Total Miles 210,000 + $600 taxes and fees ends up with a value of 5.6 cents per mile.
And yes, I would have paid for it or done whatever I needed for us to go on our honeymoon in at minimum C.