This is nice but don't you think 200 is a bit much?
It's a antique and in perfect condition.  
Yes but that's too high. I'd give you 110 for this. 
That's almost half of what I'm offering.  I can let it go for 175.
I could go to a thrift shop and get one for that price
This is one of a kind. You won't find a vintage mirror like this in a thrift shop
One of a kind? Are you sure abut that? If so how about 120?
I welcome you to find another one like it.  I certainly doubt you would find it for any less than 150