Do they take movies,cds without cases,do they buy older baseball cards?

You're out of luck selling movies it CDs without cases. I've had them flat out refuse to even touch them. Baseball cards are a no, unless they are really valuable ones. No one buys baseball cards any more. You may be better off trying eBay.

Yes

They don't pay much in general even with cases.

They don't pay very much at all for movies without cases. They occasionally buy baseball cards, just depends on their value.