What would you value this on eBay?
Used but in great condition blue gameboy advanced sp with leather look case, charger, car charger and games: starwars II trilogy, spiderman 2 and shark tale.
Enter the blue gameboy advance into ebay search and then click enter.
After that, scroll down and look on the left side of the page for "completed listings'. Click that and see what it has sold for in the past. Use that as your "reserve".
You can also use Terapeak.com to find past completed Ebay listings for that same item. But, that costs money.
There are many options you can choose from in completed Ebay listings. I.E.: blue gameboy advance with games and accessories. That will help you to find what price you should put it at. BUT, be sure to pay attention to item condition as well as rarity of the games you own when setting a reserve listing price.