You can pick up a Hostage rest for under $40. It has all the advantages of a WB without all the fletching contact.

Budget sights are hard to find, but a few good suggestions have been made. You really get what you pay for and sometimes you are money ahead to spend a few $$ and get a little better piece of equipment. Spot Hogg makes some rugged lower end sights.

Even the Bare Bones is a much better sight than many on the market.

Dan