Do we know how mant will be available after the presales are fulfilled?
That would be good to know. Though they surely won't release actual sales numbers (name someone who does?), they've been vague about how many extras they have. Twice as many as pre-ordered? That's probably too low. Ten times as many? Probably too high.
If the bag is good, many will be happy to have spent the extra $20 to be sure by waiting. They could sell through a bunch relatively quickly. I'm still hoping for a second run with some different colors (yellow/black please!).