SD cards aren't terribly expensive, but if you factor in the time that it took to get in the car, drive to Target, buy the thing, drive home, and then do the swap, it was more costly as my time is incredibly valuable to me. Unfortunately I don't have any devices in the house that use SD. USB memory? Check. Compact Flash? Check. Sony Memory Stick? Got it. SD -- nope. Crap. I won't probably use the SD again so whatever price it was, even if 10 dollars, was a waste of both time and money.
The easy solution would be to bump the price to $230 and charge 30 bucks if they don't return the SD card. That way it's all right there. Regardless, the warranty service was stellar. I didn't have to stop playing as the system was still usable but noisy.
Sorry, I meant are NOT terribly expensive...
I hate trolls.

Systems I currently own: 360, PS3, Wii, DS Lite (2)
Systems I've owned: PS2, PS1, Dreamcast, Saturn, 3DO, Genesis, Gamecube, N64, SNES, NES, GBA, GB, C64, Amiga, Atari 2600 and 5200, Sega Game Gear, Vectrex, Intellivision, Pong. Yes, Pong.