Some advice please

[Bill Regan]

When researching one of the houses in my "ugly" list I found out it's been served a notice of default by the bank. I confirmed with a neighbor who was out walking her dog that the people had moved out after about ten years. It last sold in 2003 for 73k. Comps are around 120 ARV, it needs some rehab for sure. Just the other day when going by (it's around the block from me) I saw an RV parked there and it has been there for the past few days. So, my questions are: Should I go knock on the door to see if the owners have returned? And if so, can you easily wholesale a pre foreclosure in Florida? Any other ideas on how to proceed?