>>1895255dude it's not like he sets the pricing.
A shop that sells Treks and Speshs isn't going to be aggressively cheap.
I don't know why you think you want or need 105 for your first road bike either lol. If i was you i'd try find a rim brake Claris or Sora bike with decent spec. If you want more performance later upgrade the wheels.
'Aluminium 105' as the paradigm of sensible performance is a 10 year out of date boomer meme.