There's a novel subscription-based way to try out many of the newer over the counter and private line cosmetic skin treatments via a program from New Beauty magazine.
For about $30 a quarter, you get the TESTTUBE™ delivered to your door which contains about half a dozen products from major cosmetic companies and smaller boutique brands.
While there is good reason to be skeptical of the claims made by many (most) cosmaceutical products (read here), a program with such a modest outlay gives you a great way to test some of these products yourself. I actually just bought a subscription for my wife this morning!
BTW, I have no conflicts of interest to declare with New Beauty :)