would the Avante dealer take as a trade-in? That would be the super easy way.
When I bought my Gammill used, I was responsible for take down and moving--I hired an area tech to help as we knew nothing--WELL worth the $$ to the tech. We ended up not having to take apart as much as we probably would have otherwise. We paid with check because we were first "vetted" by a mutual friend that owns a quilt shop. That was also the way I found the machine as the previous owner did not want to advertise it as they did not want strangers coming to their house--which sounds paranoid, but they lived in country and had lots of machinery that they did not want strangers knowing about. Good luck! (my friend advertised her machine via local guilds)