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:
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.
Contact me for your best price offer.
I will not accept any checks, certified or otherwise unless I am in the bank with you while you are getting it.
Contact me at (717) 467-3917