Well, I was a prosecutor for many years first before I left for private practice.
The way it works in Florida is that trafficking charges encompass possession and sale. So, there are not seperate min mans for possession v. sale. One of my major problems with our drug laws. Also, there are enhancements for sale of drugs within a 1000 ft of whatever. In my prosecution days, we often joked that they should make a charge of sale of cocaine NOT within a 1000 ft of an aggravtor because it's tougher to do.
Anyway, the only min man for a sale charge is when it's within a 1000 ft of a school. That carries a 3 year min man.
Like I said, once it reaches a certain weight, whether your possessing it or selling it, the min mans kick in. The weight varies from drug to drug. The min man levels (depending on weight) are 3, 7 and 15 years. My biggest problem are the pill cases. The weights are extremely low - 4 grams. In some cases, you can have something like 8 pills and reach trafficking weight. Or, sometimes when an addict doctor shops and gets two prescriptions for oxys...that's now technically trafficking.
Regarding simple possession...yes, I've seen many people get sent to jail for simple possession. Sometimes prison. Now, clearly we're not talking about first time offenders here. I would say, in my experience, people dont get sent to jail for simple possession until their third time.