I can tell you I dont like granum void as i mindlessly grinded it for like 8 hours to get 2 sets of protea and all the weapon parts, not counting the jackal kills for BP.

Just started Railjack for the first time because i needed titanium, looks super cool and fun, i just wish there was a better tutorial as its gating me from a quest and some content.

Give it time, when the 3rd party API shuts down on 6/30 and mods can no longer moderate as needed, you might see some returners

Check if the weapon is meta, goto warframe market, price mine 1 plat cheaper than the cheapest if it has garbage rolls.

If good rolls are present i will price it mid range and drop it 50 plat weekly till it sells.

To me plat in hand is worth more than some potential higher price down the line.