Just because you hauled something 20,000 kly doesn't mean any one will want to pay millions of cr for them, or actually want them.
Sure, price increases as availability descreases, but there is a point where no one is going to pay any higher for something. Its a $683 still. Do you expect anyone to pay more than a 2370% mark up? Or will everyone just say "yeah that's nice and all, but I can't see paying you $50,000 cr for a still. I'll just wait until Jeb makes another run out that way and I'll tag along and pick one up there..."
I think the 140ly cap makes a lot of sense. It would be silly to think that prices would continue to increase with distance and that someone would always be willing to pay that price.
err yeah - clearly your knowledge and experiences of the realities of real life are very limited; I suggest you take a trip to reality (or google) and look at some of the prices artworks sell for mate. Failing that ask yourself why someone would pay $800 RL dollars for a SQUARE watermelon that isn't even edible - and NOT PARTICULARLY RARE either?
or try this - meteorites. On earth, all over the world meteorites are being traded and not just whole ones, but slices of them too. - So you take 1 "large" one and slice it up like bread, polish it and sell it... value? Upwards of ONE HUNDRED THOUSAND DOLLARS..... PER SLICE depending on the type of iron crystal formations (yes IRON, the most common metal available all over the world) what type of gemstone inclusions it has (or not) and how many. The gemstones themselves are also worth a LOT of money, so much so meteorites get dissolved in acid to get the gems out.
What factor do you think is responsible for the prices? Take a guess - just one.
Rarity.
So, your argument is utterly flawed - because even people on earth will pay a significantly higher than "logical" price for something if it's rare and SHIPPING DISTANCES for other items IS A FACTOR OF COST
ON EARTH.
On top of that for rares trading in ED, you have noticed the size of the galaxy right?
So take a RARE item (clue is in the name) and take it somewhere availability is ZERO and voila mega money. The REALITY is that if in 3303 a pilot flew 20,000 ly (using the limited jump system not a star wars style 1 jump hyperspace) to take just 27 of an item that was
already rare where it was bought to a place where it doesn't exist at all, and the value would be (and SHOULD be) mega mega money.
Now, factor in that in
every including 3rd world) society there is always that one guy / girl with more money than sense why should it be capped that once past 140 ly you only get "x payout" when you can potentially go from one side of the bubble to the other with a rare?
The reason this doesn't work is because the whole trading system is still a placeholder. The "rares" commodity needs to be more specific and the trading system needs to be revised so that DISTANCE as well as price is taken into account - similar to a shipping charge.
Once again this shows the flaws in creating a galaxy of such a size, then adding other parts to the game that just don't take the size into account.
oh, yeah one last thing in ED 20,000 ly isn't "around the corner" so Jeb is going to think twice about doing a 20,000ly trip, risking death and the destruction (or even just a repair bill) of a multi million cr ship for a measly Cr 221,000 profit.... thus adding another factor to the rarity.
nothing about this trading economy is logical, and nothing about it matches realities of earth let alone the distances of the galaxy, and it absolutely isn't "Dynamic (TM)".