Amazon currently has the popular Panasonic 5-Handset Cordless Phone System on sale for $98.99. Amazon list this as the KX-TG7875S model. – https://www.amazon.com/gp/product/B00BP7SW0C
One of the great features is to sync your smartphone to your home phone with Link2Cell technology to make and receive cell calls, and has talk time up to 10 Hours.