Trade 833(plus $200.) for a 833od?
You have a std 833 and he wants your trans and $200 for his OD unit?
If that's the case grab the crack pipe from him.
An OD trans at best and finding someone desperate are $150 at best. Most of the time they are under $100 and closer to $50.
A good std trans is 125-300 depending on condition.
I have an OD unit I'd trade and I GIVE YOU cash...