Is it new or used? If it's used, Skylanders starters are unfortunately all but worthless in my selling experience. One thing you might consider is breaking up the set into components and selling them individually on Amazon. For some reason, if you sell figures and the game and the portal separately, you can actually make more than selling it as a complete set (shipping will be cheaper for you too). The Green Gil Grunt goes for around $12 used and you can make a little additional profit on the higher shipping fees.
Eventually someone will buy all your starter figures, I sold a Tree Rex by itself for $5 and shipping and that's an incredibly common figure everyone should have. The other option is sell everything but the Green Gil Grunt and hang onto it until the price rises. There are only 20 or so listed on Amazon currently ... wait 6 months and you can use scarcity to your advantage (things always sell for more on Amazon than eBay ... people always pay more).
Hope some of those ideas are useful. Cheers.
Its new. Like I said, I'm trying to get gta. Honestly just need monies lol.