It is seductive, I know. These machines look nice, and have solid "vintage" appeal. They have tons of features, like this model (the 750) which has a built-in buttonhole stitch, and takes Flexi-stitch pattern cams to make all kind of exciting stitches.
But don't say I didn't warn you - this machine will disappoint BIGLY
Yes, I know, there are people who say they've had this machine for 50+ years and it still sews perfectly. Lucky them! But just be aware of what lurks "beneath the hood," and will come back to bite you sooner rather than later.