I've been meaning to post my assortment of vendors I use to make my wildly popular stickers for a while now. All of these hard-working tiny shops offer very low prices, and high quality work. I've used all of these vendors to produce my assortment of stickers I have for sale (and some that are not for sale...), and would highly recommend them to other sticker makers out there:

• Sticker Guy! (Reno, NV)
  My go-to spot. Best Black on White Vinyl prices anywhere, and 250 minimums means you're paying pennies per sticker. They have specials that are always worth it for spot colors and special sticker stock choices.
• Print Dirt Cheap
  Inexpensive full-color bumper stickers in low runs; When you need more than spot tones to send a message!
• Sticker Mule
  Test runs of 50 of full color die cuts and specialty stock for ~$20 shipped, as long as you get their emails and act when they offer specials. Great for testing ideas and high-value exclusives, but too pricey for full production runs - read on for other options... Get $10 in store credit by using this link! Owner is a Trump Supporter! Fuck the Fascists!
• Stickerfied (Burgaw, NC)
  A new entry to our list, plenty of stock choices and deluxe finishes from a veteran owned business.
• Uncle Slappy's
  Small runs, multicolor silkscreens for cheap on vinyl, eggshell + blanks for graffiti writers who bring their own sharpie.

Good luck with your sticker designs! Have you perused my own selection?