We were doing a kitchen and bath at the same time and ordered the bath vanity through the kitchen designer. We had the marble top fabricated from scrap. It ended up being the same price as a restoration hardware equivalent and better quality and customizable. HD and Lowes carry a WIDE range of vanities in terms of materials and quality. I'm sure you could find much less expensive options there.

We originally bought one from HD, but wound up sending it back. Although it was listed as being made of wood, it was actually mostly MDF. Which is fine, but it was way too expensive for a vanity that was mostly MDF. We wound up going to a smaller kitchen and bath supply, and are very happy with the vanity. The only problem now is trying to find a top for it, but that's a different story...

Just FYI, we realized that most of the vanities at HD and Lowes with built-in drawers would not have worked with our plumbing. Granted, we need a very small vanity, but it's just something to think about.

When we remodel the master bath (someday), based on this experience, we'll bypass the box stores and go straight to our little local connection again.