You need to be an "ESPN Insider" to read the full thing, but Bill Barnwell of Football Outsiders happens to like Kevin Kolb:
Kolb's raw statistics look worse than Vick's -- especially his 3.7 percent interception rate, more than twice Vick's rate of 1.6 percent -- but a lot of that has to do with Kolb's Week 17 start against the Cowboys. That game came with rookie Austin Howard making his first career start at left tackle against DeMarcus Ware, and the Eagles left LeSean McCoy, Jeremy Maclin and DeSean Jackson on the bench. Kolb threw three interceptions, two of which came on Hail Mary passes. Take out that game and the Eagles' pass offense DVOA with Kolb under center was 28.9 percent; with Vick, it was 29.9 percent.
Barnwell also chimed in on what he thinks the Eagles could expect in a trade:
Considering Kolb's experience and age, Philly should hope for a haul similar to what the Atlanta Falcons received for Matt Schaub from the Texans. Atlanta picked up two second-round picks and moved up two spots in the first round of that year's draft. With the 23rd pick in the first round, the Eagles don't have an obvious trading partner in need of a quarterback nearby; the closest candidate is the Miami Dolphins, who pick 15th. If the Eagles can move up and get a pair of mid-round picks, they should pull the trigger and consider it a good haul.
I think getting hung up on what other QB's were traded for in the past is mostly irrelevant. There are far too many variables (like the number of teams that could be in the bidding, contract details, etc.) that factor in mightily when determining the market for a player. However, I do think he's in the ballpark of what the Eagles should expect to receive, depending on what he considers a "mid-round pick." Does a "pair of mid-round picks" mean a 2 and a 3/4, plus a swap of 1st rounders? If so... sold. Or does it mean a combination of a 3 and something lower? If so, no thanks. Personally, I don't think there's a need to get too cute. I had the Dolphins as the 7th most likely team to deal for Kolb (others have them higher), with Miami simply giving up their 1 (15th overall) straight up.
And yes, CBA, blah blah.