NEW YORK (MainStreet)--Auctions are the best treasure hunts. Check out this week's top Charity Buzz offerings for good finds that also do good.

Item: Billy Joel Personalized Steinway Baby Grany Piano
Potential Buyer: The blues-filled piano man who has some serious extra cash in his pocket.
Online Close: April 2, 2013 4:10 p.m. EDT
Estimated Value: $60,000
Proceeds Benefit:East Harlem music students

Item: Enjoy a Speaking Walk-On Role in David O. Russell's Next Film, Starring Bradley Cooper, Jennifer Lawrence, Christian Bale and Amy Adams
Potentinal Buyer: The film buff craving publicity who cried at the end of Silver Linings Playbook.
Online Close: March 27, 2013 4:00 p.m. EDT
Estimated Value: $50,000
Proceeds Benefit: Kenny Gordon Foundation

Item: Meet Charlie Rose After a Taping of his Show at Bloomberg in NYC, dinner for 4 at Harry Cipriani and 2-Night Stay for 2 at The Sherry-Netherland
Potential Buyer: The news junkie who has a thirst for the epicurian.
Online Close: March 22, 2013 2:00 p.m. EDT
Estimated Value: $10,200
Proceeds Benefit: Lycée Français de New York

Item:Power Lunch with David Maisel, Former Chairman of Marvel Studios &Hollywood Executive Producer
Potentinal Buyer: The corner office macher with a serious Peter Pan complex.
Online Close: March 26, 2:26 p.m. EDT
Estimated Value: $5,000
Proceeds Benefit: Shine On Sierra Leone

Item: Spend an Intimate Evening with James Cameron When You and a Friend Tour his Deepsea Challenger on April 13 in Santa Barbara
Potentinal Buyer: The mariner-cum-film buff who is unafraid of a ship wreck..
Online Close: March 28, 2013 2:00 p.m. EDT
Estimated Value: 20,000
Proceeds Benefit: MUSE School