Hi everyone, I have a relative that wants me to sell some of his camera collections on eBay to help pay his medical bills, I don't know anything about vintage cameras so I like to ask you guys to figure out the value of the three camera that he wants to sell. I got the model number(or at least what's written on it)...one is a Rolleiflex 3003, one is a Linhof Press 70 and one is a Alpa 6c. He says they all work and I'm in the US. Thanks in advance.