Trying to come to a number

68 wanna b GSS said

First of all rusty I don't know what you don't understand this isn't rocket science

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He doesn't know what you are asking and neither do I.

"I want to buy / sell something but I don't know what it is but I want you guys to tell me what it is worth"

Is that about right?

Here's the answer:

Hell I don't know!!