I need to get reflectors for an upcoming shoot. I looked around for prices and found some affordable ones, brand name. Then started looking on eBay and found 48" reflectors 5-in-1 colors ( translucent gold silver etc) for $15-$20. Roughly half of brand name prices. What's the difference between brand name reflectors and cheap ones online. Seems to me there aren't many? The concept of a reflector Is really simple?