I just did a craft fair this past weekend and the best sellers were micro-beaded pens ($1.50), marble magnets (.50) and decorate pillow boxes ($1.50) made up and ready for gift to be put in them. I cheated on these, though. CTMH has them in packages of 10 for $4 (I think) so I bought those instead of making them myself and decorated them with a jumbo wheel, ribbon and tag. We also sold candy cane seeds for $1.00.
I thought my coasters would go over real well but no such luck, plus my tile magnets. People seemed to like the acrylic frame post it note holder but no one bought them. Thankfully, I didn't over make anything so I wasn't left with too many extras, except my tile magnets and coasters. But I can give those out as door prizes or Christmas gifts.
HTH, Good luck.