I see a date of 7/10 on the computer face. So what?
Here's the problem. There are 2 red flags in your posting.
1- The computer is being sold for a fraction of it's value.
2- You have no history on this forum
I'd consider buying it using PayPal with my credit card so that if the computer failed to show up or it was not as advertised I could dispute the charge and probably get my money back, but you just never know.
I'm sure I'm not the only one who has the same thoughts.
Just say'en.
If you check my posting history you will see I purchased a computer from another member here. The transaction was smooth, the computer is great, no problems.
Since I have a history and you don't, then why don't you send me the computer and I'll pay you after I receive it and check it out? You expect a buyer to trust you with their $400, then why not do the same for them?