Any advice with online pharmacies?

If you don't need anything super controlled, you don't need to use an offshore one. Offshore pharmacies that sell Xanax, Valium, Percocet, etc. have a lot of weird loops you have to jump through, and sometimes your packages get intercepted at customs. If you're in the US, really any will do the trick (quick Googling revealed http://rx1-onlinepharmacy.com/). They all have about the same prices and take credit cards.