You need not worry that you're targeting "older women" or that 40 is no longer considered old. No matter how great an idea you have about a certain market, ALWAYS DO A SMALLER TEST MAILING FIRST! Average test mailings run around 1000-1500 names. Once you see acceptable returns on the smaller mailing then you can jump in with the larger numbers. You may think 40+ is a good age to start with the eye cream, but you may get better results purchasing age 50+. Test test test! Sometimes.
like with our home woodworking tools, you Executive List have a product or service that you are not comfortable that you can adequately narrow your list by the normal qualifiers. You can make certain assumptions about people who are woodworking hobbyists: Mostly Male, Probably Homeowners, but what else do you really know? At this point you may want to consider using a privately "managed" list. These lists are going to cost more per name but will give you a much better way of pinpointing possible customers.
For example you could order the subscriber list for Fine Woodworking Magazine. The cost per name would be $0.095 per name compared to the normal average cost of $0.05 per name. These names are nearly double the cost, however you are guaranteed that all of the names you get are for people interested in woodworking and therefore are much more likely to be interested in your product. With the "women over 40" example - some may be wrinkly