That's definitely true when fabrics run over $10 a yard. I love a good ruler - specially if there are multiple uses or applications. Or even for single use but high volume where consistent output is going to be key.
Patterns -- not so much, but on occasion I do find it's worth it to have someone else figure out the details for me. I have pretty high expectations for a pattern, however, and I really don't want to pay for a general idea and vague directions. If I pay, I expect accuracy, multiple size options (usually), fabric requirements clearly and accurately listed, step by step illustrated directions, tips for problematic piecing or pressing, and it's always nice to see multiple color/placement options and some quilting suggestions.