Pattern tiers are mostly community-driven, but there are definitely established spreadsheets that the high-tier collectors use. For an AK, the "Blue Top" is usually what dictates the Tier 1 status, and the "Scar" pattern is the king of them all. If your blue is interrupted by a lot of purple or gold, it likely falls into Tier 2 or Tier 3. Be very wary of people sliding into your DMs offering "quick cash" for it, as that is a huge red flag that you have something valuable. Your best bet is to look at recent auction sales for your specific pattern seed rather than just listening to what random people on a forum tell you.