My landlady has been searching the house for things to sell. We found a few things but something weird keeps happening. First we listed some pokemon card boxes. For weeks, no response then suddenly two different people messaged within an hour of each other, both wanting them. Then we advertised a footstool. Again, same thing, no response for weeks then on the same day within an hour two different people responded wanting it, and both rushing to be the first to get it. Then we found an old CD rack and advertised that, again, no response for weeks then tonight two people responding within an hour of each other both wanting to come and get it tonight. What is going on?