First of all, congratulations to Crazyguitar! Sounds like you got an awesome deal.
I'm glad for the comments about dealers' practices, because they stress an important point: the generalization of a fix percentage to be deducted off the new price will never work with a musical instrument, as its condition and hence value may vary greatly. You can work with a rule of thumb at best, but the resale price of a specific instrument will almost always be significantly higher or lower from that, depending on how grave the playwear is, not to mention real damage.
For the same reason, I find it fair to delete the prices from old sale threads. Sure, they would be helpful to determine a general ballpark for other sellers. But in the end, what another seller has offered may have been in a much different condition from your offering. Also, I've seen the prices vary greatly over the past decade of playing and buying ukes, so it's irrelevant or misleading to see what someone paid ten years ago for the "same" model (which, again, wasn't exactly the same; makers may have changed and improved many things in the meantime, just look at the older bridges and tuners from Kanilea, or changes in their bracing system, or the finish, the logo and the fretboards from KoAloha).