This is a nice option for those needing a security blanket.
The 180 day period is exceedingly long. If the sellers have bought their next home, the dual mortgage payments will hurt.
The possibility of the home selling for more than the appraised value and profits going to the former sellers are poor. ERA will accept the first offer that comes along since they will have little incentive to sell above this figure. That's because the longer it’s on the market, the more it costs ERA.
If nothing else, this is an option to consider when selecting a real estate agency.