Looks like it's in great shape. I don't know what she's asking, but I have several treadles myself and I would say buy it!
I'm sure you will love it. You can find manuals on line if she can't find it. And also the attachments. But would be a bonus if she finds them in the drawer.lol And with Billy around you can get help if something isn't working right. Although honestly, I have bought several old machines this year, and the most I have had to do is adjust the tension a tad bit. And clean it up. And I love all of them.