Warren Liu has been an Elvis Presley fan almost as long as he can remember, going back to his childhood in Taiwan.

How big a fan? In 1977, the year the King of Rock died, the investor bought the former RCA recording studio on Sunset Boulevard in Hollywood, partly because he knew Elvis had recorded there.

He sold that building 15 years ago, and now he’s at a stage in life where he’s looking to get rid of his last big piece of Elvis memorabilia: a white baby-grand piano reportedly used by the singer at the studio in the mid-’70s.

“I’ve kept it too long,” said Liu, 67, of Woodland Hills who has had the piano in storage at a relative’s home in West Hills since 1997. “I think other people, a new owner, would cherish it more.”

Eight years ago, Liu received a $520,000 eBay bid but rejected it as too low. This time, he’s willing to settle for less, especially if it goes to what he calls “people with class.”

He’ll be auctioning it online again this summer, this time with the help of the Pasadena branch of iSold It, a franchise that markets and coordinates eBay auctions.

So how much is the piano worth? It’s hard to say.

Though known for a guitar slung across his chest, Elvis was perhaps a better piano player and composed songs on the instrument, said Isaiah Evans, a director in the Beverly Hills office of auction house Heritage Auctions Inc. and a self-described Elvis nut.

But it’s not clear how often Elvis played this particular baby grand. The Los Angeles Times reported Elvis used it to record “Green, Green Grass of Home” and “Pieces of My Life” for a 1975 album, but collectors still might not be willing to pay as much for this piano as one owned more exclusively by the King.

“It’s nowhere near the provenance of something that, let’s say, never left Graceland,” Evans said. “When you get into, ‘Did Elvis actually write on it or play on it?’ everyone who could answer that is probably no longer with us.”

And there are discrepancies. Liu has documentation, including a signed letter from Elvis’ former road manager, indicating RCA purchased the piano in 1968 or 1969, but Pasadena iSold It owner Hal Sonifin said the serial number dates it to 1974.

“He probably doesn’t remember the exact date (it was purchased), but he knows the piano was there during Elvis’ time,” Sonifin said of the ex-road manager.