They may be a little cheaper, but that doesn't mean they suck. Depends on the brand you get. I've had no problems with my wipers from there. If you've had a bad experience with them, doesn't automatically mean they all suck.

 

I got my OEM blades at the dealer (Atlantic Audi/VW in Egg Harbor Township, NJ) for about $42. They do work far superior to blades you would buy at any chain auto parts store. Ebay and Amazon are great too as some other people said.

 

I just put on the Bosch Aerotwin (part #3397118933) on my 2005.5 A4 and it was easy. Only $32 (for a set) on Amazon. This is as cheap as any other option and the blades are great.

Link:
Amazon.com: Bosch 3397118933 Aerotwin Original Equipment Replacement Wiper Blades - Set 22"/22": Automotive

 

The OEM blades are the best I've ever had. They fit to the windshield without pressure points. Mine are the originals at 5 years old. Still in great shape. Never had wipers last this long. Occasionally clean them with windshield glass cleaner to get the wax from the car wash off.

 

Audi does not make wiper blades, buy Bosch blades, thats what Audi does

 

I have been amazed at the longevity of these blades. I've not replaced them and had the car for about 18 months now. I too have never seen wiper blades last like this and still work so cleanly.

 

Rainex for the win! Super cheap and you hardly ever have to use your wipers.

 

dealerships are always going to be more expensive, but theres a reason. they are better. just like brake pads and things of that nature. i work at a dealership and our wiper blades for the 2011/12 models are way up there. i couldnt tell you how many people come in with complaints of wipers not lasting or streaking and if you look, they arent factory. wither way, you spend the money now, they last x amount of time, or you buy a few sets of aftermarket ones and you spend the same money over the same time, just not all once. just my experience

 

Just an FYI, I got mine OEM from a dealer for $22 each. So... while some dealers will try to rip you off, some will give you a fair price. Also, you can tell the dealer that's ripping you off that you found them for 22 at another dealer, and try to lower the price that way.
I got mine at McGrath Audi in Glenview, IL

 

picked up wipers for our A4 at costco for $14.00.