About to buy a used scooter "Velocity 2008"

[migsmikes]

Here is the link to the scooter I'm getting yuma.craigslist.org/cto/2890566186.html
I'm not sure what brand it is.
The seller told me everything works on it besides the fact that it blows out a little bit of black smoke.
Can I fix the problem on my own? What could be the problem? It's 150cc's

[abscooters]

The black smoke is probably either oil in the exhaust or a valve adjustment. 400 miles is nothing.