grantartistry.com

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auction houses

bonham's (3_17_12)
***christie's
 (4_1_11)... specialist loic gouzier  (4_7_12)... christie's specialist brett gorvy (4_14_12) (5_4_12) (5_11_12)
doyle NY
... hold an annual "street art auction" (3_30_13)
phillips de pury
, ny (4_29_12)
(5_31_12)...an international auction house that specializes in contemporary art... more info here (6_29_12) ..."a boutique auction house which has a staff of 130 split between its two manhattan locations in chelsea and midtown"-- WSJ (8_17_12)
***sotheby's... of london
(4_1_11) (3_9_12) (4_27_12)
***sotheby's ...of New York
... (4_14_12) (5_4_12) (5_12_12)
***sotheby's .... of paris
 (5_12_12)