Hello,

I've recently been interested in buying physical bitcoins (just as a hobby)

I saw these 2 online:

Casascius Silver ANACS 2013 MS-64 Bit coin 0.1 BTC Loaded - 500

Casascius Silver ANACS 2013 MS-67 Bit coin 0.1 BTC Loaded - 675

My question is 2 fold. what is MS64 vs MS67 mean and what is the average price for these?

Seems steep since the 1 btc to usd price is 416.


Thank you for any guidance