What is going on with buyers?

[Mocazen]

I have been a member on here for over 5 years and have had great experiences and have met great people on here!! I took a break form selling watches on here for about 8 months and decided to get back into it. I have sold watches since then, but what is going on with this new breed of buyers, that after you answer all their concerns and questions and agree to buy, completely disappear. Mind you, I know sometimes people change their mind, that is the nature of this business, but in the last 2 weeks, I have had watches "sold" to over 6 people and they disappear...