Do these things even work?
No they don't. Wrinkles are a combination of age, genetics, and sun exposure. Dry skin exacerbates wrinkles, so you can moisturize away some fine lines and a topical exfoliant like an AHA lotion will minimize the appearance of other types of fine lines, but once they start to appear they are there for good (unless you get surgery or botox). The best prevention is appropriate sunscreen applied properly and appropriate, gentle daily skin care. Don't buy the idea that expensive is better (it's not), some of the best products are made by Olay (Ulay in Europe), and Neutrogena, both reasonably priced drugstore brands.