Look Fantastic is a great website. Also, Jersey Beauty Company is a bit cheaper and free delivery I think and gives samples.
Beauty Flash used to be a good website for Dermologica but their prices went up, you have to pay for delivery, they bombard you with emails, and you tick boxes of what samples you want and they send something completely different, usually the stupid stress relief oil
so I stopped using them.
Personally rather than spend £££ on the Age Smart skin resurfacing cleanser, I just use the Essential Cleansing solution, which can be used as a hot cloth cleanser with a flannel and is excellent at removing all your makeup and stuff, (whereas the glycolic one isn't) and then I use the "skin renewal booster" which is the same kind of thing except you are leaving it on the skin instead of rinsing it off like the expensive age smart cleanser. So whilst i do have one of those in my shower and use it occasionally in the morning, I probably won't buy it again, I'd rather get my glycolics from a product I leave on.
Another great Dermologica fruit acid product is the Daily Resurfacer thingies - they are these little finger mitts that come individually wrapped. You put one over your finger, and scrub it round your face. They work twofold - the scrubby action exfoliates, but it leaves a lovely fruit acidy stuff on your face so if you use one at night you wake up baby soft and glowy in the morning. THey are not el-cheapo and I don't use them every day by any stretch but they are great to have in to use the night before a special need to look good day or when you are feeling crusty and flaky. I had to hide them because my husband kept using them and I'd go to have one and there'd be none left.
You can use Dermologica quite cheaply if you have the Essential cleansing solution (I buy the big pump pack, lasts ages even with Mr Devine using it) and the Skin smoothing cream as you basic set, and just supplement this basic regime with perhaps the resurfacing booster and an exfoliant, and an eye cream if you want to splash out. The eye creams last absolutely ages.