In the USA, can I get Canon Powershot a400 (digital camera) for less than $150?

You can get one here http://www.amazon.com/gp/offer-listing/B... but it is used one.
I would recommand you use this one. CASIO EX-Z60BK 6 MP Digital Camera 2.5" LCD 3X Optical Zoom 4X Digital Zoom. You can get that one brand new at $199. And it is ultra compact. For more details go here http://www.newegg.com/Product/Product.as...

tey looking at ebay

how bout u stop being cheap and get a good camera