This is a GotWay Electic unicycle, which has not been opened. I don't know what they sell for in the US usually, but overseas I found them from about $1800 - $2000 (converted to USD obviously)

You can find for information on the ACM here:
http://www.kebye.com/about/...

I am guessing that ACM is the line, and ACM2 is the version since there is no ACM2 page on their site, but I am not positive.

I will not accept any checks, certified or otherwise unless I am in the bank with you while you are getting it.

Text is best as I only check my email periodically.