Might be looking to sell a C 23x Plasma and wondering what the value is, also open for any offers.

worth about 5kctp

fixed that for you

Nope. Datacubes are about 500 to 1k ctp each, so add 6 of those to the standard plasma price of 2-3k, and you get 5k approximately

Considering how RP planets get cheaper and cheaper nowadays, I guess 3k-4k is better instead of 5k. (in term of 'how much ppl willing to buy')

The datacubes are that price for a different reason entirely, and that is the people making 90x research planets. The reason a 23x is only 2.5-3.2k ctp is because the added benefit of those extra 6 richness levels is at best only 3 points worth of research per production point on the planet..

Meaning that if a 23x sold at even 4k ctp then compared to 2 17x at the same size with the same setup you would have... maths below

Let's go with a paltry 40 production points cuz we'll assume they are defended fairly well.

at 23x each production point on a peaked colony is worth 17.5 of the resource.
at 17x each production point on a peaked colony is worth 14.5 of the resource.

Since there are two 17x planets it becomes:

40*17.5 = 700 production
40*14.5*2 = 1160 Production

So at that price point by buying two 17x plasma planets instead of 1 23x plasma you end up with 460 more production or a cost benefit ratio respectively for both transactions of ~3.45 CTP per prodctuion point on the 17x planets and ~5.7 ctp per production point on the 23x planet. The relation of the two is ~1.65 therefore at point per production values using the standard 2k for a 17x plasma we see that the 23x planet should be priced at roughly 3.3k ctp at a max. After that the 17x plasmas become a more cost effective purchase for the buyer.