A friend of mine who sold his company told me that it's common to get approached and if the buyer is serious things move very fast. Most of the time though it's just a game of delay to keep competition in control and get more insights. So, if buyer is interested they will make an offer quickly (initially maybe too low), but they show they are serious by doing so. Dont get dragged in meetings or fly around to meet buyers like crazy. Better to focus on growing the business.