If you order from HTG, call them and talk to them about the shipping. Their internet pricing is WAY too expensive on the shipping end, but they are a great company to work with and will definitely work with you if you call up and ask nicely. Their prices are hard to beat and they have their own line of lighting equipment which works great and at an amazing price.
Craigslist isn't a problem to buy off of. Bring cash and if possible dont use your real email/name and figure out a way to avoid them seeing what you drive and the plate numbers. Besides, its legal to buy growing equipment but being careful is usually a smart thing.