Real life is always more important then a game, and if things come up sometimes you don't have time or don't think to send a message about it.
People need to realize this is a game, not real life, and this isn't the mods job. Things come up sometimes and they won't always have time to tell you they are leaving before. If they have time, maybe a quick 'I'll be right back' would be good, but I believe a lot of people forget that the mods have lives and they do do other things.
If they have something that pops up in real life then they might not have time to even send a simple "brb". They are mods for a reason, they are trustworthy and loyal people. and if they were going to scam you, its very simple to just send a message to jeff and have him revok their mod status, delete their account, give you your stuff back, etc. its not like your stuff would be kept and you would never see of it again. you should just be patient and be appreciative that they are here on pb in the first place so they can do transactions like that for you to begin with. This is just my opinion.