Is the seller local?
I would not offer anything over $50-$100, and, even then, I'd at least ask the person to guarantee it will work - the seller would agree via email they would give my money gack, if I give them back the transmission. Then, pay with a Postal Money Order. Might scare them into being honest (it will not really give you any protection, unless you send the Money Order through the mail with a registered letter/copy of the email-message agreement.
The parts you will need for the enclosed drive-line is the transmission's rear cover/housing and a 1/2 ton u-joint for use with an enclosed drive-shaft SM420 (the forward yoke, at least).
