This still available? I can't PM you

Hi Everyone,

I'm looking for a new, still sealed, Trezor Safe 3 Bitcoin-only edition, the orange one.
Sadly was not able to get one and would like to add it to my collection.

What are some best practices for storing private keys or seeds? Are there any good resources with best practices? What are your best practices?

Some questions that come to mind:

• How many copies to you keep?
• Do you keep it on multiple mediums (paper, usb, cryptosteel, cdrom, etc)?
• Do you keep the full seed/key on each medium or split it (e.g. 1/2 on one paper, 1/2 on other paper)?
• If the seed/key is encrypted (e.g. veracrypt or keepass), is it safe to store on cloud storage?
• Where are the best places to keep copies (cloud, buried in yard, home safe, bank safe deposit box, parent's house)?

I've been doing some research into air-gapped cold storage methods and have found some options

• https://bitkey.io/
• https://glacierprotocol.org/
• https://tails.boum.org/index.en.html

Are there other well adopted methods with best in class security for cold storage, not only for bitcoin, but other cryptocurrencies as well (ethereum, zcash, etc.)? What do you prefer?