Come on. They didn't buy them, they got the items for free. It's kind of like printers these days: They are cheap on the store shelves but when you get home, you can only print 10 pages before you run out of ink and need to buy the first expensive cartridge - because the one sold with the printer was only 10% full.

But yeah, Natsu needs to eat some fire. This is annoying to watch. Fortunately Gajeel still kicked the usual amount of ass.