Regenerist is a very nice line. It is gets high approval ratings on Beautypedia. It's not all that cheap for drugstore but if you get it at CVS, it is often on sale or on buy one, get one 50% off. I get P&G Olay coupons in the Sunday paper as well. Plus at CVS, you get those extra bucks all the time.
CVS also has knock off versions right beside the real thing (compare the ingredients lists though), although when I go in to CVS armed with all my various coupons, the real thing can be much cheaper than the knockoff.
I am sure Rite Aid and Walgreens have pretty good specials and knockoffs too. There are ways to whittle down Olay costs.
I'm using other things for treatments rather than Olay now, but I still use the Regenerist lotion with SPF 50 for my daily facial sunscreen. I use a different sunscreen on the arms and legs. I really like the Olay with SPF for the face. (Edited)