DomainHELP

The domain aftermarket is very active. Many registrants registered quality names many years ago and never actually did anything with them (not even by monetizing them via domain parking).

These domains attract all kinds of players out of the woodwork. Including:

Domain flippers

These people probably already have a buyer for your domain lined up at a certain price. Their objective is to entice you to sell at a lower price, effectively creating an arbitrage situation for themselves

Domain resellers