You didn't see an ad for a "Shelby Cobra"...but it is real...a real AC Cobra.
The car is COB6127, built by AC Cars at the same time as the Shelby Cobras were being built in the USA.
Claimed as the last chassis built by AC...why not seek a half a mil? It may get a taker or two. Typically the COB/COX cars have good value, but below the corresponding CSX cars. ...that may be changing.
