Reading your description of what it did, $12 seems pretty inexpensive. That's a lot of work!
If you knew up front it was a $12 fix, do you think you would have decided to just live with the scroll bar? Would have tried to fix it yourself? Do you think you would have been able to easily find and fix the problem?
If I wasn't in learning-about-the-new-model mode and knew in advance that it was going to cost me $12 in actual money then yes, I would have taken a stab at figuring it out myself.