Specify bank details for sure?

Today I put my laptop on Ebay for action and now have a more than tempting offer of 700 euro.
My laptop is in very good condition and quite good, but 700 euro seem almost too good.

Now, the person means they would need for bank transfer the owner name of the account, the bank, Iban, and BIC.
I'm supposed to send the laptop to London.
Honestly, I find the offer extremely generous, but I do not want to fall for any scams. Especially since there's currently only a bid of 90 euro, and I now 700 offered.
The person also speaks very broken German, which seems somehow funny to me at the price. You would not be so hasty send a message, right?

Therefore my question: can something go wrong if I communicate this data to the person? What should I pay attention to? Does that sound strange to you?

I would be very grateful for your advice!

The person is not authorized to debit from your account. As a result, you are protected by the SEPA direct debit mandate, which is not available or has been signed. Bank details can be specified securely. Wait for this person to transfer the money and then send the laptop.

As an alternative, how did you plan to receive your money? You have to divulge any data. If your buyer accepts prepayment, you are essentially on the safe side. If you do not feel confident about the offer, then in case of doubt prefer it.

The money will never arrive… What will arrive is a good fake mail from the alleged bank of the alleged buyer, that the transfer is only released when you send the parcel number of DHL…

So you have to send the package… The transfer will never come.

And in that case, you know it's cheating. But nobody got hurt, right? Right.

Payment in advance must be anyway. For this the buyers need your account number. If you have an account that does not have overdraft credit and is zero, you can hardly be stigmatized.

Beware: sometimes they transfer too much, you have to transfer the excess amount back and then cancel the first transfer.

In that case I should ask my bank again, I guess?

Nope, the notebook is on its way to England.

No, why should she? She does not know anything about your activities on Ebay.

Read my comment again. You will notice that I advised to send the laptop °°° after °°° the money is in the account.

So you have to send the package…

Why should one have to?