Free advice is often ...

Free advice is often overpriced.
 Charles E. McKenzie

Quotes from the same author

Nothing grieves a child more than to study the wrong lesson and learn something he wasn't suppose to.
 Charles E. McKenzie
Schoolteachers are not fully appreciated by parents until it rains all day Saturday.
 Charles E. McKenzie
Sign on a High School bulletin board in Dallas: Free every Monday through Friday-knowledge. Bring your own containers.
 Charles E. McKenzie
Isn't it wonderful how dogs can win friends and influence people without ever reading a book.
 Charles E. McKenzie