He sold his condo 5 years ago for an "estimated" $11.5 million after asking for $13.95 million. So your link is at least 5 years out of date and not very well researched.
Rush Limbaugh Makes Good On Promise To Sell His New York City Apartment Variety
SELLER: Rush Limbaugh
LOCATION: Fifth Avenue, New York, NY
PRICE: $13,950,000
SIZE: 4,661 square feet, 4 bedrooms, 5.5 bathrooms
YOUR MAMAS NOTES: Last spring, right wing radio talk show blowhard Rush Limbaugh made a big stink about selling his New York City apartment due to what he called, “stupid, punitive, and massive tax increases” put into place by outgoing and unpopular New York governor David Patterson. There were few New Yorkers–and certainly none Your Mama knows–who publicly mourned the potential loss of the proudly vitriolic shit stirrer. Mister Limbaugh, who spends most of his time in posh Palm Beach, FL, is finally making good on his–as it turns out–not so idle threat to dump his New York City digs. The button pushing pasha of conservative commentators recently listed his full floor Fifth Avenue condominium with an asking price of $13,950,000.