Used Fox 2.5 Purchase Questions

So, here's the situation. I found some used Fox 2.5's that fit my truck, 3 of them actually. They are used and the current owner has no idea about the past of them. He purchased a trail truck and they came with it/on it and he went a different route and now has these for sale. They don't look to be in horrible shape but they are dirty and show some corrosion. My question to you guys is what do I need to look for? Obviously damaged shafts and such but what else? What's the running rate to rebuild them? How bad does the corrosion look to you guys based on owning a set for a few years? Thanks in advance!

 

Where is the corrosion? Looks good to me, just wash them and check that the bushings are ok = no play. About rebuilt prices: http://www.ridefox.com/service.php?m=offroad&ref=topnavservice

 

email Fox, they don't suck