12/15/2012 11:00 am ET

Seal Locking Down $6 Million Bachelor Pad

A CHANGE IS GONNA COME for Seal ... at least in terms of where he lives ... 'cause TMZ has learned Heidi Klum's estranged hubby made a formal offer on his very own bachelor pad in L.A.

Our real estate sources tell us ... Seal has been eyeing a 5,500-square-foot mansion in Brentwood recently -- which hit the market 18 days ago for $6 MILLION.

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