I am also going to have to raise the price on the stickers, starting with the next batch I order. They were originally $1 each, or 16/$15 if you bought a Fleet Box worth. After a while, I lowered the price to $.75 each to sell off my remaining supply of stickers since it appeared that interest had died off.
It turned out that there was still interest, so I left the price at $.75 each because I was not sure if raising it back to the original price would work well in this poor economy/low demand situation. However, the print shop has been gradually raising my price for stickers, and it's roughly 20% higher than it was a mere year and a half ago. This is cutting into my profit substantially, and as such, I find that I will need to raise the price next time I order more.
I expect that I will need to raise the price to $.85 each from $.75 each now, unless they spring another price increase on me. Ordering a larger quantity of stickers will lower my price somewhat, but I have to be careful to not order too many stickers lest they sit around here for months, tying up funds.