Commercial RE auctions

Hello. I am wondering if anyone knows the best way to find Commercial Real Estate auctions. I am trying to buy an apartment building and thought that would be a way to find a distressed property. Is this type of auction found at the courthouse along with the residential properties?

Just wondering how the experts use auctions to their benefit. Also, do you need to pay up front at an auction or can you finance these purchases?

Thanks,

Sonriffic