Due to their popularity, works by certain artists can reach vast sums at the leading auction houses such as Christie's, Sotheby's and Bonhams.
For example, in May 2008, an oil painting by Erik Werenskiold sold for £272,970. And in 2003, a landscape by Benjamin Williams Leader RA sold for £145,000.
Here's a list of the heavy hitters in our own collection together with their respective 'auction maximum'.
Erik Werenskiold, £272,970
Portrait Of Ingeborg Motzfeldt Løchen
Roland Svensson, £193,578
Portrait Study Of A Man
Peter Mønsted, £187,666
Portrait Of Aage Jørgensen
Friedrich August Von Kaulbach, £151,844
Portrait Study Of A Girl
Benjamin Williams Leader RA, £145,000
Study Of Conway Bay And The Carnarvonshire Coast
John Inigo Richards RA, £135,000
Landscape With Country Track, Figures, Cottages & Far-Reaching View
Landscape With Country Track, Figures, Cottages & Far-Reaching View
Léon Adolphe Belly, £130,000
Woodland View With Pond
Agnes Cleve, £72,567
Portrait Of Jan Bolinder
James Stephanoff, £65,000
Portrait Of Miss Smernove
George Vicat Cole RA, £47,788
A Sunny Afternoon Near Arundel
Josef Theodor Hansen, £47,468
Nocturnal Study Of A Mosque By A Coastline
John Smart RSA RSW, £44,000
The Grounds Of A Scottish Baronial Mansion
John Da Costa, £43,600
Reflections After The Ride
Carl Johansson, £36,318
Sollentunaholm, Sweden
David Bates, £36,198
Rural Landscape With Thatched Cottage, Country Track & Pond
Francesco Ballesio, £30,000
The Music Master
Edgar Bundy RA, £27,000
The Wallflower
Alfred Hitchens Corbould, £24,598
Portrait Of Lucy Wickham
George Goodwin Kilburne, £23,443
The Finishing Touch
Carl Budtz-Mølle, £16,539
Church Interior
Rudolf Riemerschmid, £15,380
Children Dancing In A Wood
Jonathan Pratt, £15,000
Peeling Turnips
Eiler Rasmussen Eilersen, £14,000
Romantic Forest Landscape With Cottage
Ernest Higgins Rigg, £13,658
Sunset Swaledale
William Hatherell, £13,000
The Balcony Embrace
Alfred Gomersal Vickers, £12,999
River Landscape With Church
Peter Tom-Petersen, £12,189
View From Brahetrolleborg
Eden Upton Eddis, £12,000
Portrait Of Muriel Paget Bowman
Otto Voigt, £10,282
The Finishing Touches
Julius Paulsen, £10,115
At Bedtime
Wooded Landscape With Cottage