Have you considered getting a quote from Carvana? It's easy to get a price quite from them and there's no obligation. Their prices for used Mirages are insane...
There's a sale pending on almost all of these Mirages!!! Those buyers need their heads examined. But if Carvana can sell them for crazy prices, they might buy them for crazy money, too.
In my opinion... I'd get the windshield fixed and make the car perfect. Carvana will ding you if the car needs a new windshield.
I sold a car to Vroom and it was super easy...and I got within $1,000 of what I would have gotten from a private sale. I would rather light $1,000 on fire than to try dealing with morons looking at my used car. It's even worse with a high dollar performance car. I've sold a couple of those...but never to a private buyer. There's just too much grief involved.
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View my fuel log 2015 Mirage ES 1.2 manual: 52.2 mpg (US) ... 22.2 km/L ... 4.5 L/100 km ... 62.6 mpg (Imp)