I found a Samsung Galaxy cell phone today. I know i should return it but im in need of money. What steps do i need to take to make the phone mine to sell?

If it's a CDMA phone like sprint or verizon it's probably reported lost or stolen so it has a bad esn so it's not worth as much. Go to craigslist and post it as bad esn for around 170-200
if it's tmobile or AT&T (sim card) remove their sim and put it on craigslist for around 350

1. take off the back
2. take out sim card
3. put back on
4. sell
5. go to hell