Since I do mostly beadwoven or bead embroidered jewelry, I don't have very many pieces for under $50 - even the Swarovski crystal earrings I make sell for $75-$80 per pair. Last year, I had a whole box of "leftover" necklaces, bracelets and earrings from when I was doing mostly strung jewelry and I put them out on my tables at my farmers markets and they flew off the table - even the pieces that were priced at $65, $70 and $85.
This summer I made a nice set of display boards for my high-end bead embroidered pendants and beadwoven necklaces and they went like hotcakes. I was amazed. I had one woman purchase a $165 piece from me and place an order for a custom necklace for an additional $135, and then there was another customer who purchased one $155 piece from me only to come back the next week and purchase a second $135 piece! It was insane - I never figured I would do so well with them, so now I know I have to spend the winter making a lot more of them for next season.
That said, I also have a line of fused and lampwork glass pendants, bracelets and earrings and those range in price from $10 for a pair of small dichroic glass studs all the way up to several hundred for a necklace made entirely from lampwork glass and gemstone beads. This summer, I could not keep enough of those $10 studs in stock - I was making 3 dozen pairs every week! I'm hoping to have the same problem once the holiday shopping starts.
So I guess to answer your question, it depends on where and when you are selling. I was amazed at how well my $100+ necklaces and even my $80 earrings went this summer. And I was so pleased that apparently people were so satisfied with the quality that they came back for more!
Good luck! Let us know how you do!
-Jen 
Your Guide to Beadwork on About.com.
My Etsy Shop http://www.vanbeads.etsy.com
My blog http://www.vanbeads.blogspot.com
"Yesterday is history. Tomorrow is a mystery. But today is a gift. That's why it is called the present." -Kung Fu Panda
