Felonious Possession of Stolen Goods is a Class H, not a Class C felony. For someone with the worst possible record, a Class H can carry up to 39 months in prison. Obtaining Property by False Pretenses is usually also a Class H felony. If the property is worth $100,000 for more, however, the case does become a Class C, making it punishable by up to 231 months in prison (19 years, 3 months).
In your question, you mention that all of the defendant's cases are moving to Superior Court. That implies that he has not been convicted of any of them. If that is correct, his record could potentially be clean (free of convictions as the time that he was charged with the felonies about which you are asking). In that case the potential punishment would be significantly reduced.
The defendant is facing very serious charges and would benefit from the advice of an experienced criminal defense attorney. I urge him to contact someone as soon as possible for advice specific to his case. Click on this link for more on defending against serious felony charges: