...does the seller have to sell it to me at that price?
It's an antique item, listed a few minutes ago with an obvious typographical error - unless she has gone bonkers.
I've bought from this seller before, and emailed to say I wanted to rpevent some random person buying it for £2 and making trouble for her. So it's just a fantasy, really, a 'what if'...but would she have to sell me it, if I made a big fuss?