Also check Saks Fifth Avenue outlets and Nordstrom's outlets. I bought some great french cuff shirts at the Nordstrom's outlet last year. I don't recall the price, but I can't imagine I'd spend more than $40 and buy more than one.

They usually have outlets around major metro areas, so check around the Denver area. I know Marshall's and other outlet type clothing stores also have french cuff shirts, but I rarely bought them there because they never had the right size for me. Those would be the cheapest place to buy them, but I'd still check Nordstrom's outlet because you'll find better colors and styles there.

Finally, K&G Mens stores have french cuff shirts in lots of colors and styles. I used to buy dress shirts from them in their Kansas City metro area store. K&G also has dirt cheap prices.