Yesterday afternoon, a one bedroom foreclosure on the 23rd floor became available at Marina Blue.  The unit has 845 square feet of interior, 143 square feet of balcony and is decorator-ready.  The condo faces northeast with direct views of Biscayne Bay and departing cruise ships.  The unit also overlooks the site of Museum Park.  The asking price is $199,900, or $237 per square foot.