I think Pryor did well in Oakland, considering this context, OAKLAND.
The fact that Seattle gave only a 7th for him tells little in this story, Oakland sucks at trades, it's different markets, Seattle have a franchise QB. The rumors around Mallet link him to franchises in a need of a new QB, and for a QB who are familiar with a specific system, which is completely different from what they run in Oakland (do they have such a thing like a system there?) and Seattle.
Pryor is an excellent choice for a Russell Wilson backup, runner QB throwing as minimum as possible, maximizing his chances. They also look like brothers. A 6th round pick would be in order for that trade, but Oakland is not in position to demand anything.
The good thing about this draft is that they will definitely draft a QB high to compete with Schaub.