I am extremely indecisive about what I should spend my referral points on. I was wondering if the items ever retire from the shop or if they always stay the same?

They've never retired referral items before, and since referrals take so much time to get, I don't think they'll ever retire items there.

i'm going to second and say probably not. if they ever did, like many years down the line, the items would probably eventually be attainable elsewhere (like the crystal shop or something)

ok, awesome!