The thing about buying other people’s chairs is you never know who has sat in them.

The thing about buying other people’s chairs from the Sutton Place Hotel, the ones that curve into an egg shape as if to cocoon one’s head, is you know exactly who has sat in them — famous guests such as Michael Jackson, Bob Hope, Ted Danson, Sophia Loren.

Unfortunately — or, depending on your appetite for Danson and his ilk, fortunately — the same cannot be said about the bathrobes.

Both the curved red chairs and the $30 white robes are among the scores of historic memorabilia now being sold at the Bay St. hotel which opened in 1967. (The two $2,500 lobby chairs, alas, are already gone.)

It’s all part of a charity fundraiser organized by Lanterra Developments, the developer that purchased the hotel for $57 million and plans to turn it into condominiums, set to open at the end of 2015.

A similar sale — albeit a more high-end auction — took place at the former Four Seasons Hotel, two months ago. The luxury Yorkville landmark is also being gutted and turned into condos.

All proceeds from the Sutton Place sale, which began Wednesday, go toward Mount Sinai Hospital’s neonatal intensive care unit. Beds and sheets from the hotel will also be donated to Toronto Community Housing.

Lanterra president and CEO Barry Fenton said the company hopes to raise about $200,000 from the Sutton Place.

That means everything — from $1 plates to a $30,000 painting — must go.

The deals on Day 1, many agreed, were divine.

Edward and Theresa Wong surveyed a bucolic gold-framed tapestry that cost $25, before settling on four glass lamps, at $20 each.

“They go so fast,” said Theresa Wong.

Items include those you might expect at the sale of a hotel’s contents: mini-bar ($50), ice bucket set ($20), iron ($10.)

And others, such as a $5,000 grandfather clock, a marble-topped night stand for $75 or the $30,000 original Antoine Bouvard painting of a Venetian canal at sunset, are all part of the Sutton Place charm.

Visitors can also enter to win a hotel bedroom or living room set.

Some pieces you just couldn’t find anywhere else. Jack Maguire carried around a Sutton Place plastic desk pad — price: 50 cents — to lay across his table at home for scrawling. “I always throw the big paper away and it ends up in some pile,” he said.

Wheeling a cart to the checkout counter, Lorraine Jackson stood in line to buy a stack of dishes and serving plates, all for about $30.

“I was actually quite pleased when I added it up,” she said.

But luck plays into it: for larger items, buyers must write down a lot number and approach a checkout desk before they make their purchases. In some cases on Wednesday, single items were already gone, although the hotel plans to restock some furniture in the coming days.

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It’s also important to be patient. Laurie Snowden desperately wanted a $75 round wood table with a patterned glass top.

“But then you have to wait in the line,” she said.

The sale runs Thursday from noon to 8 p.m., Saturday and Sunday from noon to 5 p.m., and Monday to Wednesday from noon to 8 p.m.