A deal is brewing. The Select Board on Monday expressed willingness to negotiate the sale of the former Brown Street Furniture Building. Sara Dunn and Shane Morton have requested an abatement on more than $120,000 in unpaid property, water, and sewer taxes before closing on the 48,000-square-foot factory space, 17,000-square-foot warehouse and 12 acres of land. Terms under discussion would waive more than $56,000 in past-due interest, but require Dunn and Morton to pay approximately $65,000 in tax liens and back utility bills, according to figures provided by the town. Actual amounts may vary. The matter is under review by town counsel. Select Board members expressed general support for the proposed compromise.