Chiller recharge cost?

[Aquattro]

I'm not sure what's wrong with it, it's running when it's supposed to, but suddenly not chilling much. It could have a slight leak, which would explain why it ran for weeks after it froze (from the pump failing). Just trying to scrape up enough spare cash for lights and control module, and hopefully that's enough. I'll try to fix the chiller, it's an expensive unit (Aqualogic Delta Star 5 1/2hp), so I don't want to toss it. Even if I fix it and sell it I should be able to recover something.