if interested in a man, how does an older woman "over 40" let him know??

im retired now and notice many women alone out walking and shopping. im an outdoor person and garden a lot mostly in front yard. people talk about me and my projects amongst their cliques, but never approach me and show any interest. positive comments come back to me about my wardrobe and i still look much younger than my 61 years. i wonder how important wealth is. they drive mercedes\range rover, and other european brands