I am going to be buying a muzzle loader off of my cousin's boyfriend and I am looking for a decent scope within my budget of $10

[DranDran]

I am going to be buying a muzzle loader off of my cousin's boyfriend and I am looking for a decent scope within my budget of $100. The muzzle loader is a T/C .50 (not sure of the exact model), and he is selling it along with powder pellets, a cleaning kit, bullets and the primers all for $200. Is there anything else I need besides the scope?