D asks...
As part of an anti-acne regimen, both my dermatologist and aesthetician recommended I start using the SkinCeuticals spray toner and Hydratin B5 Gel. I'm getting great results, but am not thrilled with the price of the moisturizer. Yes, it is concentrated and lasts a long time, but at $45/oz on eBay, it's an awful lot of money. Is there a cheaper alternative with the same active ingredients?