Deep Discounting & It's Effects

I was recently buying an SSL for my new domain, SimpleStorage.com and during checkout I entered a code that brought my total from $178 to $38, a 78.6% discount for less than a minute of coupon searching.

At what point does a customer not believe you are being honest. I know that the technology business are the benefits of margins as high as 90%, hoever, this discount caused me to loose faith in the pricing and discounting.

What would cause you to to question the product?