And people say to me 'Why do you put a line through the middle when you write down a 7?'
This is why.
I'd want to see the '7' or the '9' card before making a decision, but my first reaction is a poorly done 7.
If you sell it on eBay, you can always call it a 1/1 with the description 'Only card in the run that is TWO different numbers!!!'