Sounded a bit of a silly idea to me, tbh.
The vast majority of property sales are simply people buying somewhere local to live in, there's no real benefit in trying to shoe horn in the more unusual stuff like buy-to-let and overseas as they would be better served by specialists. Its not like you go to the estate agents to look for a flat and they think "damn - I'd love a little place in France too but now I'm going to have to traipse off somewhere else for that"