Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
These may be great headphone and this may be a good price but I will never know because the vendor does not have any in stock.  Ordered last Sunday and discovered today that they can not deliver until first week of September - if then.

How good is that?

Amazon should do a better job of policing it vendor "partners"; how can they let people sell stuff that they do not have in stock in sufficint quantity so they can deliver?

Also, why is it there is not email address so one can contact Amazon directly?

What is Amazon afraid of here?

I will spend my money elsewhere.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: E: very negative