If you are after affordable flyers then you will be able to get them through certain channels that is because not all printing services would have affordable deals that may appeal to you. The best option would have to be to go online and see which websites have special promotions running as you will be able to benefit from special deals and offers that are occasionally advertised by various printing services that offer flyers at lower than normal prices.
If you are interested in going for affordable flyers then the first thing that you should do is scan through the Internet to get a list of different websites that happen to deal in them which you could bookmark and refer to on a regular basis so that you can check if they have any promotions running at the time.
This will provide you with best opportunity of being able to benefit from any promotions that may be running from time to time however you will have to check the terms and conditions as not all discounts would be applicable to all types of businesses. Some printing services offering affordable flyers would only be making the discounts available to new customers and not to those who may have previously placed an order with them.