Look I have no idea but their are many possible ways like a garage sale, eBay, markets in Caribbean gardens and other things like that.
There are Sonic Colors toys at Toys-R-Us.
from toys r as
Sonic Adventure does.
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Toys R US
The best place to look for vintage Sonic toys is eBay. You will find a wide variety of toys in different conditions, and decide how much are willing to pay for each item.
yes
yes
well at toys r us and maybe toywiz
Ebay is safe and if their is any problem all money is refunded and they respond to you very quickly. Ebay stock a whole range of sonic toys from watches to games and toys.
Sonic Boom Toys
You could always make them yourself.