Does it costs you anything just to TYPE the word Sorry? You won't die by saying that, instead, you can solve this matter in a peaceful way. You don't 'WIN' by persisting till the end.

No one said that a 19 years old can't buy/sell. We just hope to have MATURE sellers, mature in thinking. You should reserve your item for the winner even if someone offers you RM1000, that's a good and responsible seller. If you don't, you're a irresponsible and selfish seller, just admit it.