Miele CM 6350 Questions

Hello,

I have manual coffee machine and Baratza Sette 270 Conical Burr Coffee Grinder.

I only makes 1-2 cups a day.

My dad upgraded from Mielle CM 6350 to another machine and gave me his old unit... But it takes up so much space.. ( I have not set up or pulled a shot )

Questions.....

1. the total lifespan indicated by the machine is 5416. The machine is 4 year old. Is this machine too old? Will it fall apart soon? Should I replace any parts, o-ring?

2. If I were to sell it, what would be a fair price?

3. I searched google, and it seems like super automatic need more frequent cleaning... with more moving parts, For super Automatic users, do you drink 3-4 cups a day like my dad?