Weird statistics / Is RNG character dependent?

Not sure if a bug or just bad luck/rng design.
Playing HC SSF Runes of Aldur: from lvl 25 to 73 - I poured all gold, transmutes and augments, alch orbs, etc., to craft a + minion sceptre. I went over at least 600 i25+ sceptres, and at the very least 1000 suffix modifiers. So far, I have only seen:
2 sceptres with +1 minions
1 sceptre with +2 minions.

At the same time, in the trade, +2 sceptres go for 1 ex, so I am sure not everyone is as "lucky" as I am.

Sounds like whining, but I just want to make sure there is no thing like RNG core rolled for a character, which might result in incredibly bad RNG for specific items. Hopefully, RNG generation is character-independent.