So I recently have had water damage to my iMac and they charging me $755 plus tax. Is there a cheaper option? Or a way that they can redo the diagnosis because I do not recall a time where water got near my laptop.

Really? How do you expect us to know it had water damage without inspecting it? There is no way we can provide you with an answer.

Are you having problems with your water damaged iMac ? What are the issues?

"Repair options" is the user's post. The rest is in the Question. Not about using a water damaged computer, Leroy. 😀