The former Bradford College in Haverhill Mass., vacant for seven years, is up for auction, with Sept. 18 the deadline for bids. The liberal arts college closed in May 2000 because of financial problems. GFI Partners, a real estate development firm, bought the property in 2002 for $10.1 million. Rezoning a portion of the property in 2003 enabled GFI to develop housing on about 17 acres at the rear of the former campus. But efforts to find a buyer for another 20 acres at the front of the property, which is zoned for educational use, have been unsuccessful.