It would be best to have an experienced agent represent you. It won't cost you any more.
Toll Brothers is a huge publicly traded company and very well known in the builder world - probably one of the biggest in the country. They are luxury builders and did that famous cross promo with Martha Stewart right when she got out of the slammer (she had a hand in the design)
You can see some of their national projects here: http://www.tollbrothers.com
The company has gotten beaten up with the national market crisis but overall they do good stuff.
For those reading and curious check some of the estates out here:
I couldn't find any sold data in my quick search but if i come across anything i will post it here.