If you a are a smart home-buyer then you should ask your real estate agent whether it is bed bug free and when was the last bed bug inspection conducted.  WIth the resurgence of bed bugs in the past years,  homes up for sale aren’t necessarily free of bed bugs.
Case in point:  My daughter-in-law moved into her new home that was infested with bed bugs a few years ago.  And here in MA, if you move into a single-family rental, the tenant is
Smart real estate agents understand that a K9 bed bug inspection will help sell or rent a home, not to mention that they now have legal ammunition if bed bugs appear after the deal is closed.