Used Mito purchase advice

Hello, I’m new here in the forum. I have an Alpha Romeo Mito built in 2010. I tested this one here today:https://suchen.mobile.de/…/276322108.html?action=parkItem On Mobile it is listed for 6990€, it costs at the dealer but 7387€ (with 12 months warranty) I had it checked by a mechanic for a short time. He recommended that I change the brake pads and said that the dealer can go down to 700€ without losing. The car should have only run 41tkm. The timing belt was changed in 2015. Can you tell me what I should keep in mind when buying it? The car was in good condition and also the mechanic said that the 41tkm seems quite realistic. Since the steering wheel was not pulled off strongly and the seat still showed no great wear. I just don’t know if the purchase is really worthwhile. And if the car is not too expensive for me in the maintenance. Can you tell me more?