Randy Johnson's big unit is up for grabs -- a 25,000 sq. foot estate with a full gym, game room, bar, basketball court and WATERSLIDE -- and all ya gotta do is be the highest bidder.
As we previously reported, the ex-MLB superstar put the house on the market for $25 MIL back in 2014 ... but didn't find a buyer. He slashed it all the way down to $14.5 mil before finally deciding to put it on the auction block.
Place - Paradise - Valley
The place is insane ... it's located in Paradise Valley. Here...