(adsbygoogle = window.adsbygoogle || []).push({}); I've been duping my maxed out buffalo for around 120k using the mechanic glitch. I am able to sell the dupe after the 45 min wait period every time. Haven't found a work around.
BUT
I am having fun playing the game now. More people seem to be playing missions.
After 45 min I sell another dupe and repeat.
All and all I think this has made the game better IMHO

How can you dupe it??

Mechanic glitch. I don't have a video but it's out there. Check YouTube