Just a warning for everyone in general. We will not tolerate suggestions of illegal activities. It clearly states in our Rules and TOS that discussions of illegal actions will not be allowed. Besides, sinking to the level of the bad guy makes you no better than they are.
My opinion on the topic of the thread.....I think it's a damned shame that anyone would blatantly scam someone else out of their hard-earned money that way. It's no different than if he just slid his hand into her purse and swiped the money.....except....that in this case, she at least left her purse out where he could easily reach it, so to speak. Impulse buying something like this is risky all by itself. Doing so without being fully educated about what you're getting is just begging to be ripped off.
To those suggesting that he took advantage of a handicap....that could only happen if he was aware of the handicap. I doubt she goes around informing everyone she meets that she can't distinguish colors very well.
Anyhow....to sum up....if the guy weren't a complete asshat scammer, then this wouldn't have happened, and I lay the majority of the blame squarely on his jerky shoulders. However, I do feel the person who got scammed also has some responsibility and I hope they learned a valuable lesson. If it's worth it to you....then it might be good to pursue the matter in small-claims court. Otherwise, I agree with those that suggest you just move on and count this as a $300 tuition fee in Life's Hard Knocks 101.