Where to buy missing set pieces

sahminnj · 2014-02-07T04:41:42.000Z

I bought a lot that contains about 10 sets. I have the books and bags of pieces. This is for my own collection. I started sorting and the stickers for set 3221 are missing. The pieces are there but the stickers are not. I checked eBay and no luck. Where are some other reliable places to check?