Where can i buy sea glow?

So i need sea glow to clean the yellow soles of my Jordan 6 lakers but i dont know where to buy them. I thought they would have their own website where you can buy them from but they dont and i searched it on google and clicked on shopping and found them on eBay but i really don't trust eBay but if i do buy from eBay then how come there at different prices like the cheapest one is $9.00 and highest is $24.00