Generic ballpark pricing is -
$8 per line of text/graphic (100mm x 600mm)
~$55 text/graphic (1000mm x 600mm)
+Plus postage and handling, small items like bumper stickers etc can be postaged like a letter for the price of a stamp..
medium parcels start at around $8.50.
Offcuts and stock items often at clearance prices, and the above figures are subject to things like: grade of vinyl used, complexity/ simplicity of layout, artwork provided/ or not etc.... price could be LESS, price could be MORE.