Welcome to StyleForum. Thank you!It is imperative that you give more information before asking a question like this.
The only scrap of info you gave was 'The most I have ever spent on a dress shirt was $145'
I have always wanted a Brioni or Canali shirt but they have been price prohibited until now. However, the cost does appear to be excessive. The most I have ever spent on a dress shirt was $145.
Should I go for it?