La Creme de la Creme

I recently had lunch with a friend of mine who always looks good, but on this particular afternoon, looked amazing. Her skin was absolutely glowing, and she looked easily five years younger than the last time I saw her. I raved about her appearance (secretly wondering to myself, did she have work done?) and she confessed that she'd recently started using La Mer foundation. "You must try it," she told me. And I want to ... but it's a whopping $85 for 1 ounce. I'd like to try it at a makeup counter to see if it's worth the hype. The thing is, given how great my friend's skin looks, I'm truly worried I'm going to get hooked, and that's one expensive addiction. How much are you willing to spend to look good?