Hi! That is a Singer model "99". It is a 3/4 size machine. A smaller version of a 66. The FW 221 and 222, and singer models 185, 99, 66 and 101 and 201 can all use the same attachments but not the same bobbins. (I have one of each, plus a 301 and 401.)The 221, 222 (FW) models and the 301 (FW's big sister) are the "lightest" of the vintage Singers. The difference btwn the 221 and the 222 is the 222 has a pull out bed that allows fir free arm sewing (to make it easier to stitch sleeves of clothing and such).
Personally, I would not pay 60.00 for a 99, unless I was able to delete the shipping costs, as you will be adding another $20-30 on for shipping and handling.
Let me know if I can be of further help. Cathy in MA