with a trade in you will get a better deal
Are you willing to ship your machine somewhere for warranty repairs and service?
Local dealers will not do warranty service on a machine you bought from someone else.
The price of anything is determined by what the seller and buyer come to an agreement upon.
Your price will be the one you are happy with.
Take your own fabric and visit a few dealers. Sew for awhile. Relax. Take home machine.