Aside from my first classical guitar (which was stolen because I didn't look after it), I have worked and paid for (and looked after) every guitar I've ever owned. That's what drove me to my first after-school job (cashier at the Spar on CR Swart road in Roodepoort).
Here's another one, asking for a free guitar:
http://capetown.gumtree.co.za./c-ViewAd?AdId=76226533 . Clicking on the link for "Poster's other ads" takes you to 13 other ads - one asking for free computer parts, the other 12 spam titled "Here is an extra couple of bucks - its truly worth it!"
I just thought to check the other ads from the original needy teen. Seems she has a self-steering kit for a boat up for sale too. Even if the seller (called Sven) is the dad of the poster, it seems to me that it's likely that the girl is a spoilt rich brat whose dad said no for once.