The massive Alfred J. Fisher mansion in Detroit is back on the market with a bigger $1.5-million price tag and an everything-must-go estate auction set for this afternoon.

The property itself already has attracted at least one potential full-price cash offer. If such a deal happens, it would represent the largest sale price in at least a decade for a Detroit house that is still in use as a single-family residence.

Real estate experts speculate that such a unique and well-kept property could sell for three to four times as much — if not more — if situated in a suburb.

Built in the upscale Palmer Woods neighborhood during the Roaring ’20s, the Tudor Revival-style mansion at 1771 Balmoral Drive has nearly 16,500 square feet, including 15 bedrooms, an indoor swimming pool and extensive outdoor gardens