Looking for a mesh router and I came across this. Seems to be much cheaper than anywhere else; other places charge this much for a 2 pack, and and a 3 pack is more like $599. No 6GHz Wi-Fi but otherwise seems well-featured with 2.5Gbe ports and reviews are good. Also supports ethernet backhaul for better performance but it will take up one of the ethernet ports (obviously) and there are only two ethernet ports on each Deco BE25.
It's also on their eBay store, and if you have eBay Plus you get free postage.
The only drawback, that stopped me from buying it, is that setup can only be done with the Deco app which requires a TP-Link account. Others may not mind this or even prefer the remote administration feature.
How does this compare to the deco x50? Similar price points but not too sure about performance