Just to give some perspective on the salaries:
Eli/Romo/Ryan/Rivers/Peyton all went for about $12-16.. So Luck at $14 isn't really a great value pick unless you think hes going to be clearly better than those guys. (M Ryan will likely go for more now)
Jennings/Nicks/Nelson/Cruz/Andre/Austin went between $28-32. So AJ Green at $33 and Percy Harvin at $28 are decent values, but again.. Nothing spectacular.
I feel like Spiller at $4, is probably a good $12-15 cheaper than what he would go for in the draft. And while he isn't going to be a #1 rb, he'll very likely be a great flex option with top rb potential.
(Not trying to argue, I appreciate the opinions, just bouncing ideas around)