I'd rather have someone how can read the code look at it, since it looks like, from what I've seen before, that it has a semi-random element, because it takes a while to collect this information, way more than the Gordos, since they only had amount of slime science resources and what resources they were as variables. The plort market seems to have an upper and lower limit per plort. The prices also seem to be influenced by the amount of plorts you sell and has an random change element to it as well. So, if we want good results by testing we first need to establish the change for each plort per day without selling plorts and since I'm guessing the changes get less extreme when you reach the maximal and minimal prices, each change needs to be written down as from X newbucks to Y newbucks.
It will take a really long time to just sort out the changes that selling no plorts makes to the market, before we can move on to the effect of plorts themselves, and whether of not one type of plort has any effect on the price of another, will be a question that also needs to be answered.
So, in conclusion, it will take loads of time, and I'm only willing to do it if I'm not the only one doing the groundwork. I could place a request for people to do the no-plort-effect-testing on the wiki forums. I think making people record 30 days of plort prices (at a minimum) should be plenty to get some results. The only problem I see it might have, is that we might not be able to see the changes at very low (or maybe even very high) prices, but we'll see.
But a site-wide test would be a good idea. Maybe if we all start a new, throwaway game, write down the Plort Prices for each day for 30 days and then Sleep, rinse, repeat and post them in a thread, we can get an idea of what the Max-Min values are.
The closest thing we'd get would be estimations. If the code is pseudo-random then this will take a lot of time and devotion to calculate the estimations. Coding isn't my thing but i'll see what I can do.
Selling a certain plort for 30 days just to keep track of which would go up or down is quite difficult. Maybe we should ask for the community to help as well.