Be sure to check it out thoroughly. Depending on when the unit was built, the 2012's had the most issues of any of the Voltage trailers. One would think the previous owner resolved those issues over the past years but most of the major problems with Voltages were on units built in 2011 and sold as 2012's. I'm pretty sure this was their first year of production and bugs were being worked out.
I own a 2013 Voltage 3200 and we have used it quite a bit over the last 2 years. It has had small issues but nothing I couldn't repair on my own.