See link below. You are in a tough market.
Interest rates at record lows.
Economy in the tank.
In most markets homes are selling, more this year than last year, but at much lower prices. Do you think the economy is going to be markedly better next year? I don't. So you either sell at a loss now, or rent it out and sell at a bigger loss next year.
IMHO keeping as a long term rental might make sense. it depends on your retirement financial plan. You might want to discuss strategy with a financial planner and/or CPA.