To each his/her own. What is your license worth to you IF you pass the board exam? Maybe you could find someone by using Craig's list, but how much time and effort would you be expending? In the best of all worlds, your dental school patient pool would have sufficient patients for you to meet your graduation requirements AND also have the "right" patient case for the licensure exam. That just doesn't happen all the time, or even, it seems, most of the time.
If the services that have been around for a while were up to no good, their reputation would have preceded them through blogs such as this. You get what you pay for.
What is your license worth? Is it worth "investing" in the future where you can start earning a return on investment sooner, rather than later let alone all the angst associated with the live-patient exam!
BTW, you won't have to rob a bank because once you start dental practice and conduct yourself with high morals, ethics, and quality, you'll feel like you are the bank!
Thank goodness for the moral, ethical and quality services. There are some out there. Caveat emptor...