Pledge $35 x 22997 backers - digital download
Pledge $50 x 23227 backers - dvd
Braff's project isn't offering these pledge rewards, a decision he seems to be OK with for distribution but would probably generate TONS of backers.
But I think the soundtrack was seen by Braff as a Big Deal, which is probably why it shows up at a lower price point ($20) than the tee.
A lot of people make the mistake of setting the reward levels at store pricing levels rather than rewards. Printed t-shirts are fairly expensive, especially when you add in shipping, so it's easy to end up with very little margin on a reward level that includes a t-shirt, especially if it's near the $15 dollar level (which is pretty much cost). It's smarter to use intangible rewards (like digital goods) that have near zero incremental cost or to make sure that you have at least 100% margin on anything else. Assuming that you're running your kickstarter for financing and not as a pre-order store.
I remember ordering once (this was 7 years ago) at $5-$7 a tee and USPS charged around 2.75 at the time, for a grand total closer to $10
"blah blah blah Zach Braff blah blah"
"Who's Zach Braff?"
"The guy from Scrubs, he also did some movies."
"Oh yeah, Garden State right? That had a great sound track."