Summer Camp Island
Craig of the Creek
$19.99 with Prime shipping. These sets have been $40 for a while, so this is a pretty decent deal.
These are Australian DVDs, though it seems they aren't region locked. The distributor, Madman, is pretty inconsistent when it comes to actually region-locking discs.
And since I could find nowhere else to share this information...
I recently emailed Madman's customer service, and they informed me that their contract with Cartoon Network has ended, and they could no longer sell their shows. Which I believe means these sets will be out of print shortly!