You did very well! If your seller packs it well, it should survive the trip home. I have purchased 3 sewing machines off ebay and all arrived safely. You might want to download the correct manual for your machine from the Singer site. Also, I could not use mine just sitting on a table because some of the moving parts hit the table. I put mine in a cabinet. Otherwise it would have had to be in a base that allowed the moving parts to clear.
You will love this machine - it does beautiful FMQ! Let us know how you like it!