Question on BSG collector DVD

[ostarella]

I keep checking out prices for the DVD collector's addition of BSG and I've come across something called the "rental version". It's a bit cheaper than the "regular" version but I'm wondering if anyone knows what the difference is? :?:

[Tracy]

Maybe it's just the episodes and not the extras?
:?

[SciFiChick]

or maybe it doesn't have the fancy box or the booklet.