I thought a nice way to give potential users a proportionate and tangible notion of pricing, would be to give the prices next to the photos of the work you've done. A measure or ruler would help give scale. Or do a few samples if copyrights a problem, but estimated costs across the materials spectrum would be a fantastic bit of help to your clients. It would give people a strong idea of where their project needs fell in the scheme of things. I always feel it's better having a ballpark idea about where a given service or purchase will fit in an overall project budget. Keeps things streamlined. Keep up the good work.