On their shipping options, they list free shipping with a longer delivery time. Here's a c&p:
Standard shipping: Ships on Monday, Jan. 31. Usually arrives in 2 to 5 business days.
Free shipping: Ships on Monday, Jan. 31. Arrives in 5 to 9 business days. Total shipping will be $0.00.
I ordered a couple of items on Thursday, and got my shipping confirmation on Friday. It's by USPS. I presume the free shipping is media mail. I did it before and got my items super quick, but I think I was lucky.
If you check their weekly sale items, you can sometimes get DVDs for a real bargain. My most recent order was for Patrick's Lean Hot Body as Collage is the only vendor that sells it (besides Patrick himself who charges CA taxes at 9%). I noticed Seasun's The Next Step in the weekly sale for $6.98! So that put me over the top for free shipping. I'm such a sucker that way.