What is the best bluetooth device for a Samsung Behold?

I'd like to get my boyfriend a bluetooth for his new phone and I want to know what the best ones are for the Samsung Behold. If possible, please let me know the price range too. Thanks so much, 10 points for best answer. :)|||a regular bluetooth that are sold at costco :] its compatable wit anything pretty much... and i think its about 25-60 bucks? haha im not sure on tht ... sorrry!