Contractor telling me i have to use his tile supply comany?

I'm Remodeling my home, Its a $60,000 Job

For a tiny bathroom in my basement with a walk in shower and to put new walls and new floors in the basement

and to put up a tiny bathroom in my living room with a walk in shower

plus a new awning and to put ceramic tiles on my backyard porch

anyways, he came to day with 1 tile and said "do you like it" i said said yes but i want to see more options maybe 10-20 choices because i am spending good money on this project he says " Well they dont have a sample book tiles but i will bring more samples for you"

wtf? I feel something isnt right