I agree that $2 is too inexpensive.
I have purchased the epoxy stickers off of ebay and had horrible luck with them. They lifted on almost all of my caps. It was VERY disappointing!
I have no idea why it didn't work for me, I get my pics printed at Walgreens and even tried printing at home on matte finish photo paper and it still lifted! Maybe it's just me or I got a bad batch.
You should try ET Lite. The caps look awesome with ET Lite and not cheap at all.