The Goblin Guide reprint will be of help to many players that couldn’t afford their playset previously. The new artwork is cool, too. While there was previously a promotional reprint of Goblin Guide available, with great artwork, it wasn’t nearly enough extra supply to keep up with the massive demand for this card.
Goblin Tribal is a popular casual deck, as is Burn. Keeping this in mind, there will be both competitive and casual demand for this card. So, it's important to pick up your copies of Goblin Guide at the best price that you can when you need it. This isn't a card that is going to ever not be in demand unless something strictly better is printed - which is unlikely.