What I know:
1. Menya interesuet opera.
2. Ya interesuius' operoi.
What I think I know:
1. Ya zainteresovan v opere.
2. On byl zainteresovan kupit' novyi dom.
What I tried to translate and I failed:
1. "Dear Aleksei, I think I found someone that might be interested in buying out / acquiring your company"
- My translation: Yvazhaemyi Aleksi, dumaiu, chto ya nashel kogo-to, kotoryi, mozhet byt' zainteresovan v ???
This language is killing me