It would save more money when you could purchase your monogrammed towels on sale since the price would be cheaper. But you should not purchase everything on sale since you might end up with many things that you do not actually need, which is why when you want to purchase monogrammed towels on sale you should pay attention to many things such as:
Towel quality: first thing that you should see is the quality of the towels itself, especially when the one on the sale is from unknown brand that you do not usually used. You could see the quality of the towels from the material that used by the towels and the thickness of the towels. It is very important when you want to purchase towels that you would actually use. But for decoration towels you could always purchase anything that looked good since you do not use it for real.
Towel style: most towels on sale might come from old stock that already outdated so it might not have the style that you want. That is why you should be very careful when choosing the towel that you want to purchase and make sure that the towel would have the same style with your bathroom.
Towel details: you should also pay attention on the details of the towel such as the colors, pattern, and monogram style that it used. Purchase details that you think would be suitable for your bathroom. Try to find monogrammed bath towels set so it would already has the same details so you do not need to mix and match it yourself.
Monogrammed towels on sale usually available on big stores when they have special even sale such as black Friday, end of year sale, Christmas sale, and many others. You might want to visit the stores beforehand so you could have more time to decide which items that you want to purchase.