Generator : box never opened - $300 (greensboro)

Ordered wrong one from amazon, was busy with new job.
Got around to calling electrician who said this was not a good option for my disabled son's needs.
After several weeks amazon would not allow return.
I paid about $400 after taxes, so great deal for you.
Would "also" trade for a smaller one that's new or used with some cash thrown in by you.