Thanks Serica for the explanation, at first while reading through, I understood the OP misclicking (so he was selling for way below the order price).
Now I understand that the OP actually filled the order correctly. Thus, technically, there actually is no "misclick / mechanical error", but rather a misunderstanding of how auction works.
I was going to originally post a hopeful post and totally disagree with the first posters who stated that the buyer wouldn't pay the appropriate amount of peds. I was going to state that recently, a lot of good people who made mistakes were helped out and reimbursed (see the reversed auctions, and also the guy whose baby dropped his gun and had it returned to him).
However, now I sort of realize this scenario is different. The person who put an order for 7 CLDs for 1400 probably wanted this mistake to happen. It seems sort of intentional.
There's still hope though, maybe they'll change their mind and heart.