Fannie Mae is sweetening the incentives for its HomePath properties to both homebuyers and real estate agents in an effort to hasten the sales pace of the GSE’s real-estate owned inventory.Through Oct. 31, Fannie is offering homebuyers up to 3.5 percent of the final sales price to put toward closing costs while selling agents representing the owner-occupant buyer would receive a $1,200 bonus under the incentive plan.