a free pair of knee pads to anybody who needs them. They'll ask for your trade and I selected “DIY/Enthusiast” because I'm very enthusiastic about the idea of building something. Don't actually ask me to help with renovating your house though. My expertise starts and stops with “I think the hammer hits the nails.”
You might get an error message that says “We experienced a technical difficulty while processing your request. Your request may not have been correctly sent.” Just keep submitting the form and it should eventually go through. It took me like 5 minutes of hitting submit, so this form could be a little frustrating to some people.
Update: They also have aand a available.