Sticker Speculations

I’ve been wanting to design stickers for the Story Lorry and finally made some images.

Now I’m wondering…

• Where do I get them made? Is it better to go online, or find a local place… maybe a place that I can see concrete samples of end product before ordering hundreds?
• Do I give them away as marketing, or sell them? Maybe both… sell if you want just a sticker, and give away if you buy a book?
• (The annoying inner critic) Are they any good? Would people even want one? I consider myself an artist, but maybe these aren’t graphic-designer-ish enough to be a sticker?