I've been an amateur photographer for a while, graduated from college, paid off my loans, and now have some expendable income. As a T2i shooter, I've had FF envy for a long while and am finally ready to bite the bullet. 35 hundo is a big bullet to bite, agreed. And the jump from models was disappointing. But investing in 4-year old technology (argue what you want about Canon's "old" and "new," but consumer understanding is what's important) doesn't make sense to me. If you bought a 5DII in 2008 for $2500, and are selling it now for $1900, that's 4 years for $600. If I sell the 5DIII in 3 years for $3,000, that's the best rental price I can find. 5DII probably won't be worth much in 3 years...
So that's my logic.