Great condition? I would say very rusty!
http://sfbay.craigslist.org/eby/atq/3185729065.html

Poor little thing. Likely was not stored well. Those damp San Francisco salty fogs are not nice for sewing machine.

http://indianapolis.craigslist.org/atq/3185032897.html
This one is a good little 3/4 size machine made by Jaguar - it is not mine but my sister did get them down to $50 which I think is a good deal. Somebody needs to go for it - I think it zzs and some other stitches too.

http://dallas.craigslist.org/ftw/atq/3186365211.html

1500.00...and its only 60 years old. What a steal!

http://dallas.craigslist.org/dal/bar/3141486078.html

interesting. wondering what they are interested in bartering for.

http://dallas.craigslist.org/sdf/atq/3173695145.html

nice looking featherweight with all the extras and table. wondering if this is a reasonable price given the table is there and its in great shape too.

nice looking Elgin treadle. 80.00

http://dallas.craigslist.org/mdf/for/3169855577.html

Singer has the centennial badge. Mostly, here in KC, they do tell you what they will take in barter. Interesting that this poster didn.t

That may be a mission style cabinet which is very nice.

Muast be the lack of the usual accompanying patina (aka dust) that makes it so valuable. :D