The insane mansion Wayne Gretzky sold to Lenny Dykstra back in the day -- only to buy back years later -- is back on the market ... with the NHL legend asking a cool $23 mil!
The property is legendary ... Wayne built the 13,300 square foot estate in Thousand Oaks, CA back in 2002 and sold it to Dykstra in 2007 for $18.5 million.
Remember, at the time Dykstra was being hailed as some sort of financial genius ... when it reality, he wasn't.
The ex-MLB star filed for bankruptcy in 2009 and the bank foreclosed on the home soon after.