Glad you decided against it... considering your age, the whole parents thing, etc., it seems like a really bad idea. As for $10 being outrageous... I mean, $10 isn't a whole lot of money these days. I understand old timers are used to paying anywhere from 0-$5 per hit, but $10 is like a six pack of decent beer... considering LSD doesn't flow like water for most folks, I don't think $10 for a potentially once-in-a-lifetime 8-12 hour experience is outrageous. In fact, it's kind of cheap.
Lastnight my dad busted a bunch of us tripping in my basement, he has no idea we were on LSD he probly figured we were smoking up at the most...so honestly they have no idea...and if it would happen that they would notice ur pupils then be like...i ate some pills the only way to tell some one is on acid is a spinal tap so i think u would be good but as always its up to you and how you think you will react.