Inkscape is free, so unless you mean using stolen property, which is not free, there is no comparable vector image editor on the market for that price.
No, I am not talking about stolen property. But a one-time payment of 40€ is close enough to free for me to give it a try. That's why I said basically the same price category, not "the same price".
Or unless you include your time in the total cost of ownership, at which point an efficiently designed UI becomes crucial.