@Barbara Brown
Hi Barbara! Welcome to BP. I have never done a wholesale deal so I could only tell you enough to be dangerous so definitely don't take what I say as absolute truth with subjects in that area! I did get my real estate salesperson license about a decade or so ago though and it was a real boon for me during my single family residence investing career. I have since let it lapse since my need for it is non-existent at this point. The big school around here for getting licensed is Bob Hogue school of real estate.
As a wholesaler I imagine you'll be sending a great deal of yellow letters to homeowners. From what I have seen in my opinion one of the best groups of people in that demographic to target are absentee homeowners. You can find various leads online such as www.listsource.com to get started. I've heard all sorts of numbers regarding a response rate but 1-2% seems to come up frequently. I'd try something creative as well in your communication with them. They get many of these letters and it's important to have yours stand out. Try googling "clever marketing direct mail" to get some ideas.
There are people on here that have done this for years and are infinitely much better at it than I am. Perhaps start a thread with a specific title such as " best direct mail marketing techniques".
As far as getting into the nitty gritty of how to proceed, once you have someone interested I've heard not to pay more than 70% of market value but I'm fairly ignorant here as well. It doesn't make sense to me to have a hard number like that as each property and its needs are different.
Take a drive around Tampa and when you see the bandit signs offering to buy your home for cash write down the contact information. Call them and offer to take them to lunch your treat. Some might be rehabbers and some might be wholesalers. Either way, you'll get lots of information and maybe create a relationship. Worse comes to worse and they are a total jerk you'll know who not to wholesale your deal to in the future! I'd also call the hard money lenders around town. They may put you in touch with rehabbers that you could assign the contract to.
The great thing about BP is someone who actually does this will probably chime in and give you a better picture than I have.
Good luck with it!