@Rebmarco,
I'm sure they are worth more than $10, but you would have to pay a professional appraiser to do the research of what similar works by Fried have sold for in the last few years. There are auction records on-line, but most sites will require you sign up and pay a fee and there is no guarantee of a match. His works are rather hit and miss for collector appeal, some of them look very dated, but some people want exactly that. I know the ballet works do not sell as well as some of his other female portraits.