Mid first round talent that had produced nothing but a dunk contest win, despite plenty of opportunities. Meanwhile Gasol was the best player in the second best league in the world.
Who Chris Wallace was only 50-50 to get to come over, and also was still viewed as a low level big man prospect for the NBA.
Even now that he's exceeded the expecations of almost everyone he's an average starting center.
There is a whole lot of hindsight being applied to make an awful salary dump forced upon the GM by a cheap owner smell like a rose.
I did a quick google search and couldn't find where Gasol was 50-50 to come over, but I'll take your word for it. And I've always said that the Grizz should have tried harder to get LO out of the deal. My only objection is that somehow Gerald Green and Sebastian Telfair who produced literally nothing at any level of basketball by the time they were traded were somehow greater prospects than the Spanish League MVP.
http://www.memphisflyer.com/memphis/marc-gasol-come-on-down/Content?oid=1144563
I think hindsight is also coloring your value of Green/Telfair at the time. Both came out of high school highly hyped with a ton of talent. In the four years since we know that one is out of the league and the other is a career backup, but back then both were still young and had promise.
Interesting point about this, that blog entry was from 3 months after the trade and cites that the big reason that Gasol might not come over is the relative value of the Dollar versus the Euro.. Is that Wallace's fault the dollar was plummeting? Do Celtics fans hate him that muh that they blame him for the recession? 
The point wsa that he wasn't a sure thing, he was always a risk to stay in Europe and was still a low level prospect.
Heck he was a low level player until he lost 40 llbs.
But you think he was a high level prospect, I don't. I bet we also disagree how good he is now.
My point is I wonder how sure a thing it was when the deal was made as compared to 3 months later.
I dunno, 12 points 7.5 boards in your rookie season isn't low level.
I also don't think you have to be a high level prospect to be a better prospect than Gerald Green and Sebastian Telfair two years into their career.
We probably don't disagree how good a player he is now. I think he's easily a top 15 center in the NBA, probably top 10. And not likely to get much better than that, although his numbers would rise if he wasn't on a team with so many scorers.