Your best bet is probably APMEX.
Since the pandemic, prices of even the lowest grade Morgans & Peace dollars have gone up.
Alot of people are hoarding silver coins. I've seen LCS in the states (MAY 2023) ask over 40% premium above spot on junk.
Somewhat unrelated, but Morgan dollars were never traditionally rolled. They came in bags. Anyone who tries to sell you a roll with a nice ender on it is most likely a bad deal.
To anyone thinking of selling, know your mint marks (such as CC, O, S). They can carry a substantial numismatic premium.
Its why I look for culls or VG at best.
I want
1000 silver dimes -------- I have 100
400 silver quarters ------ I have 40
200 half dollars ---------- I have 40
100 dollars --------------- I have 50
100 1 oz rounds --------- I have 10
100 1 oz bars ------------ I have 20
20 5 oz bars ------------ I have 17
10 10 oz bars ---------- I have 8 or 9
3 kilos ---------------- I have 0 and likely will wait on these
S I post here and look to see if anyone wants to sell some