Patti,

Yes, homes are selling this quickly in Port St Lucie! If the home is in great condition, it is not unheard of to get more than 20 offers on the first day . And, yes, people are getting into bidding wars on these properties. I have told my buyers when I thought the property was under-priced that if they really liked the house, they would likely need to put in an offer that was above listed price. Since I know the market, I also try to make sure that they don't offer more than what the home will appraise for. There are too many properties on the market and coming onto the market in PSL to put in an offer that is above what it will appraise for.
You compete by having a good buyer's agent on your side.