If the bank approved of the 470k list price that property is likely going to sell because of the traffic(interest shown). If it is an agent who has dreamed that number up and is going to try to present a surprise offer to the lender it might not happen.This last scenario is not very likely. My semi- educated guess is that odds are in favor of the property going to escrow.It could also just be a rush of interest that fades. If you go, you are taking control of your own destiny. If you wait, you will at least get standard notice and things will probably be fine. It is really up to you.
You might want to find out if an investor buys the property too. Maybe they would take you on as a tenant.