I have the Evolve. it was a gift from hubby so I don't know what it was new, but it was several yrs ago.
I thought i didn't love it, but now that i am retired and have more time to use it, i love it.
I did but the workbook and consult it before any new things to try.
I do mostly use the 3 thread but it can do 8 threads at a time. it does have the wave stitch as someone mentioned.
$1100 seems a little deep for a used one, IMO. each additional foot is a little pricey. but it does so much more than my older serger which I still have and use sometimes.