I see between $2.90 and $3.20 within a few minutes of my house... I'm guessing that the higher prices are mostly due to the high-traffic/high crime areas.
Propane was $4/gallon last week, when I topped off my jugs.
FWIW, I use it for supplemental heat for Really Cold Days - I turn on the Big Buddy 18k btu heater, and run it for an hour or three, depending, to get the house up to 70, then shut it off... I've used only one 20# jug so far this winter, and my electric is about $150 above the no heat/no ac baseline for the season... Mild winter here, for the most part.