Marketplace
Seems like a fair price. Sizes 9, 10, 10.5, 11 and 12 in stock
Features
Regular fit
Lace closure
Knit upper
Supportive heel construction
Versatile gym shoes with a durable outsole
Cushioned Cloudfoam midsole and OrthoLite® sockliner
Durable Adiwear outsole
Currently
$100 at Adidas Official website, $100 at Myer and $79.99 at intersport
Given that you can regularly get Boost models for 50% off it doesn't look like much of a deal unless you really like this particular style and you're just going to wear it casually.
I personally think they look cheap but I suppose that's because they are.