I am COMPLETELY surprised that there are no guinea pigs on CraigsList. Are there any listings that seem good but are too far away? You could always meet them in the middle (ALWAYS IN A PUBLIC PLACE), or at a landmark, like a statue downtown. I met the guy I got (correction: saved) my piggies from in Concord, which is over an hour away. Think of it as a labor of love, but if your parents aren't too happy to drive aways, offer to pay for the gas money...
DO NOT BUY FROM PETCO. It is evil. Evilll...... Sometimes you just have to be patient. Sadly, guinea pigs are are often an "impulse" pet. People buy them, have absolutely no idea how to care for them, ad end up abandoning them or giving them to the animal shelter. I don't mean to say that's what you are going to do, but if you wait a little bit, I'm SURE a pig or 2 will come in, and you can save its life!
Are you in a remote area, and don't have a local animal shelter or rescue? If you call vets, sometimes they know if people had a litter of piggies, and the people are asking a very reasonable price! But please, PLEASE, do
not buy from a breeder. Ask them if the person who has Momma pig deliberately bred her, or it was an accident.
I'm 13 too, actually, and I am sadly forced to keep them in my bedroom, as our new kitten is very curious... They don't wake me up, but then again, if a tank rolled into the house I could keep on snoozing!
A huge drawback is that the room smells like a barn. But once you live with it for about a week or two, you son't even notice it anymore. I actually WISH I had waited a couple months, because just in the past few weeks, the most gorgeous piggies came in, and my limit is 2 piggies. I'm at the limit... :*(
Hope you find some piggies of your very own!