Antique Grandfather Clock

I have a Howard Miller Barwick model 4876 that was my grandparents so its over 80 years old that I need to sell, Im trying to finish social work school and going through hard times but I have no idea what to ask for it and a clock dealer here offered me a whopping $50 which was insulting so if anyone can please help me what the I should be asking for it I would so much appreciate it. It was serviced 4 months ago and works perfectly.

Good