In Pasco county, homes are the cheapest around, they can go from $ 50.00 per sf up to 150.00 maybe more in port richey area around $ 80.00sf.
You need to get an appraiser to really get an idea, or get a Realtor to give you a CMA FOR FREE
That is a comparable just to give you a starting point.
It all depends on the location, subdivision, homes for sale in your area, it also depends if you are upside down, going into foreclosure or short sale, maybe a For Sale By Owner maybe what you need.
I dont know what your needs are, but if you like i can give you a CMA on your property, remember its a buyers market, they set the price, there are over 5800 homes on the market in west pasco county alone, so the competition is great. I am an agent and i reside in Pasco, so i know the area.
If you like more info you can email me email@example.com or 727-645-3090 Good Luck