I had the small square Quilter's Select ruler go though a laundry cycle. It still has the non slip coating on it. I bought the first QS rulers from the website as soon as it was advertised. It is still as good as it was. If you can't find QS local the best place to buy is on The Quilt Show. There are sales and specials several times a year. You don't have to be a paid member to buy any product.
Odiff non slip spray is excellent for all non slip rulers. I use it on all my Missouri Star templates and rulers. I also use it on my pad for foot controller.
I buy Creative Grids for speciality rulers and in size QS does not have. My favorite size of CC is the new 12 1/2 by 24.
I agree quality quilting rulers are pricey but I have bought toys for the kids and grands that cost more so I don't feel like it's a big deal to buy a ruler..