I just also recently bought at 440QE on ebay for $960 with the BSR but no embroidery unit so as long as it has the BSR it’s a good deal. You should ask how many stitches it has on it. Mine had over 2mil. & my friend, a Bernina tech said it was still an excellent deal. They usually go for $1,200 to $1,300 minimum with the BSR, & with or without the embroidery module. You can pick up an embroidery module later for a few hundred $’s if needed. If it’s got both, you’ve really got a steal.
My Bernina tech recommends that I brush out my machine including under the feed dogs & add a drop of oil every 3rd bobbin I use so try to follow that. The machine has been a joy to sew on compared to my Viking Husqvarna Platinum 770 I had before. I’m assured it’ll last me for many, many years to come. Good luck with your purchase!