Yeah, there is certainly always going to be competition. However, no one can sell you a sticker and ship it to you for pennies. Even if you could have your stickers produced for free, transaction fees, commissions, and postage will eat up the lions share of $1.00.

The truth be told, it is nearly impossible to sell a physical good online for less than $1.00 and expect to make any profit unless you sell tens of thousands, and even then you are only making a few cents per sale. Unless your customers decide to buy in bulk.