Should I buy uncirculated notes and expect that I will be paid more for them (then circulated notes) when I go to sell them?

No. Again, there is no difference in the intrinsic value between a circulated note and an uncirculated note. You will find that most banks that exchange the IQD do not pay different rates depending on condition. As an example, at the time of this writing a major US bank that buys and sells IQD has an offer rate of $641.70/million with no separate distinction for the quality. Dealers like SafeDinar.com will continue to pay a premium for uncirculated notes so long as a market for them exists.