I may be buying a new-to-me 99K :)
I found one nearby and I plan to check it out this afternoon! Seller states that "machine was serviced Oct 2011 ($70) (receipt available showing service received)" and is in "perfect working condition". She is asking $100 which includes the wood cabinet which has been painted.
I am completely new to Vintage machines (even though I do have my Mother-in-law's treadle that I hope to restore some day) and I would greatly appreciate any words of wisdom or suggestions to what to look for or ask when I look at the machine. Thanks in advance!