I am afraid that if I wait until the morning, the seller will either run out of btc or his/her asking price will be too high.
Another question: There is one seller whose prices I've been watching, they are low now, the profile shows he/she is "on vacation" but I have their celll phone number. I don't want to be rude and wake them up but I really want to get a good deal, so what what would you suggest I text him/her to convince them to sell me some coins?
If there ad says they are on vacation, leave them alone.
You have 180 minutes to make the deposit from the moment you click buy. Not 12 hours past.
The reason there prices are so low is probably because the seller is not updating there ads. Good Luck.