So I've been considering the prospect of farming plat and ducats from void fissures, and was not thrilled with the idea that I don't know the prices of the rewards (To be fair, I recently realized that the reward teir levels give you good ducat estimates). To this end, I build a small autohotkey script that reads the reward names, looks up their prices in a table, and spits the results back to an overlay. This is a bit overkill, but the plat value listings are kinda nice, and really, I mostly wanted to play around with text recognition.
Anyway, the plat prices are roughly the minimum median value for the last 90 days on https://warframe.market/ (This was just done by hand, so might be wrong)
The thing uses autohotkey and some text reader software called Capture2Text. Capture to text is provided in the zip, autohotkey can be downloaded. If you're comp savvy you'll avoid running a .exe file from a third party, so you should download Capture2Text as well. More details can be found in the readme.txt file.
Here's the link if you're interested.
https://drive.google.com/file/d/1JRLeWYypAYqm7lwBoi4SlULyZqI4dcvc/view?usp=sharing
Also, a screenshot of the output. Numbers are PlatValue(DucatValue)
https://drive.google.com/file/d/1dgsm1MSK2UaFsf9tf0AEu3xfj97PW3KE/view?usp=sharing