Wool & Prince make great quality merino wool shirts that usually never go on sale.
Buy one woven shirt and get 15% off
Discount Code: 15off
Buy two or three woven shirts and get 25% off.
Discount Code: 25off
Buy four or more woven shirts and get 35% off
Discount Code: 35off
Example: 130gsm Button-Down Shirt usually US$128, now US$108.80. Even more if purchasing multiple.
Now I'm no shirt connoisseur, but if you consider $100 a shirt to be a bargain I'm not sure if this website is right for you.