Maybe that's because it's jailbroken. 🙄
Something must have gone wrong in the jailbreaking process.
Best Buy will not except it if it's out of warranty or jailbroken.
That's only if it's within the 14 day return policy.
If it's not within that then you have to go see a Geek Squad guy.
And I take it since it's a 1G iPod touch then it is not within the return policy.