Not long ago I discovered an interesting little site called Fiverr. What's the idea? Create a marketplace for just about anything. The only condition is that every transaction has to be valued at five dollars. It seems like a great idea to me. There are plenty of things I'd happily do for five dollars. I already have seven or eight gigs posted. One of the most popular so far has been my offer to tell people with a tattoo in Japanese (or considering one) whether the design they have used (or will use) really says in Japanese what they think it does: believe me, I've seen some unfortunate mistakes.
People are offering all kinds of services, some of them seem to me to be worth far more than $5. Some are just plain silly, but some are eminently practical.
Martin, for example, will send three real cards (that is, paper and ink cards, not e-cards) for you anywhere in North America for only $5. He puts them in the envelopes, attaches (and pays for) the stamps, and sends your greetings on their way, so you don't have to. Brilliant. Just one of hundreds of useful things you can get done for a simple fiver. Martin's gig is here.