I got mine at Michaels too
they are located in the Flower arrangment section
(Cause they use Foam to set the arrangments)
they usually run between $5.99-12.99 depending on the brand /Size of the cutter
bit of advice:
get the Larger spool of wire it's only a dollar more...
get the silver
Uncoated wire
get GOOD quality 'D' cell batteries (it sucks 'em dry!)
Change the wire often
MAKE SURE YOU TURN IT ALL THE WAY
OFF IN-BETWEEN USES!
make sure you have ventilation