Hello Gilles! Please allow me to direct you to our sister site, Superior Violin.com, which has a variety of affordable violin bows to choose from.
The Economy Brazilwood Violin Bow (pictured below)
The Teresa Angelo Carbon Fiber Violin Bow (pictured below)
The Carmela Pietro Pernambuco Violin Bow (pictured below)
The Hermann Lugar Silver Mounted Pernambuco Violin Bow (pictured below)
Superior Violins offers a payment plan if you don’t want to pay out all at once. They also do financing, with a ZERO interest rate for 6 months. They have an upgrade program for violins, but I’m not certain it also applies to bows. Don’t hesitate to let me know if you have any questions about products or playing the violin!