A Lindner upright piano ABBA used to write some of their biggest hits could make £30,000-40,000 ($45,591-60,778).
The lot will be offered in a December 10 sale of entertainment memorabilia at Bonhams in London.
The band wrote many of their biggest hits on the piano during the 1970s, while holed up in a cottage on the island of Viggso in the Swedish archipelago.
It's an otherwise unremarkable instrument, built during the 1960s. Former band member Benny Andersson explained that it was "not one of the best pianos I have played on but it sure did the work well to compose some good songs on."
After the band split, the piano passed through the hands of various different owners. Most recently it formed one of the centrepieces of the ABBA Museum in Stockholm.
Bonhams comments: "The cottage owned by Agnetha Fältskog and Björn Ulvaeus was established as the base for ABBA's creative writing sessions from 1972.
"It has a small holding which was just large enough for the piano in this lot and two chairs to fit in.
"Benny Andersson recalled carrying the piano up to the house in the wintertime and carrying it back down to the small writing hut when spring arrived so that the group could play and compose all summer."
Last week the guitar John Lennon used to write some of the earliest Beatles songs sold for a record $2.4m.
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