Check out this listing for a Singer 206. At least they claim it is a 206, but the ad is so full of unintentional humor that I wouldn't take their word for anything. I've never seen a 206 in the wild.
the title is the first clue that some chuckles are coming: "SINGER SEWING MACHINES MODEL 206K"
How many machines? One, apparently.
Cruise on past the grammar, punctuation, spelling and capitalization errors to the end of the listing which states
"original electrical cord + battery powdered box"
and just in case you think I am being too tough on the seller, remember I DID just tell you to cruise on past all the tell-tale signs of a non-native English speaker. That's not what I am laughing at. Honestly. If I wrote a listing in Spanish, which I might just manage, it would be on a par with this.
it's the "battery powdered box" which cracked me up. That, and one of the photos. Top row, second from the right. Just what IS that object shown with the motor controller?
Why, it is an audio mixer of course. I'm just SURE you also use an audio mixer with the battery powdered box on your sewing machine. Don't you?