This appears to be a good deal for mirrors.
I like side view mirrors with built in turn signals, especially when it it raining or snowing and traffic is thick. You don't have to agree but I have bopped each of my side view mirrors and replacement cost ~ $250 each painted and installed. - Maybe because they are remote, maybe because they are heated, mostly because they are Ford part$.
So just reflecting, here are both mirrors, heated for $189.00. That is great but based on their photo of sample kit, I don't think the kit includes the actual side view housing. I think you get two flat pieces of mirror with heater and signals in the glass and wires. That is great if you want to add signals to your mirrors for $190 but - I think they should include the whole housing at that price.