I've bought stuff from events like that, and it is usually crap.  I dont' know that i would even buy tools there just to keep in a vehicle.  Imagine you break an axle on a trail.  And your bud has a spare.  your are set, right?  then you break that one wrench/socket you need to finish.  now you are stuck w/ a diff w/o a cover, no good axle in, and gear oil all over the ground.  Save your money for something a little better.  Go to home depot, lowes, or even sears (if you have enough dough).  leave the crap alone.
Just my .02