you could give her extra 10$ as a "souvenir" i mean, she didnt knew what she had.. and you found an oppurtunity to get the console very cheap, which i also would grab with hands and teeth, but giving her a 10$ tip, would make her feel happy, and you wouldn't feel so bad.. (in case you are feeling somehting about it xD)
at least i would do this... its almost a steal... so giving her a extra tip would make both feel somewhat better xD
