Janet, if you want some help with your marketing of upper-bracket homes, check out the website for the Institute for Luxury Home Marketing (www.luxuryhomemarketing.com).  They offer a two-day intensive course on luxury home marketing techniques that was one of the best real estate courses I've ever attended.  And after you take the course and have some high-end sales under your belt, you can earn the CLHMS designation (Certified Luxury Home Marketing Specialist), which will help give you credibility with buyers and sellers of those higher-priced homes.

The Director of the Luxury Home Institute, Laurie Moore-Moore, has written a book entitled "Rich Buyer, Rich Seller" that you should read.  There are some great marketing tips in that book as well.  Good luck!