All right, here we go, time to go all out on a massive idea that will probably be shut down by one simply fact or another I can't see at the moment -- to that extent, criticism is welcome.
In a few recent threads in Suggestions and General Discussion, I came across people mentioning limited availability of certain ships and/or weapons. And I got to thinking -- how can we tie this in with the game, without just handing goods to the player? And so, I came up with this concept (forgive me if it exists already, I didn't see anything like it searching Suggestions) wherein the player could hire an in-game NPC delivery service to deliver whatever their heart desires... for a certain markup on the item, plus transportation costs, plus legal fees, etc. etc. (The general idea I'm getting at would be that this is EXPENSIVE by comparison to looking for stuff on your own, something like double the item's base price at a 'normal' delivery speed).
So what happens is, you contact the delivery service via your long-range comms (stick it into a new tab in the Intel window, maybe). You tell them you'd like to place a delivery via dialogue boxes. First box is what kind of goods -- ships or items. Second is delivery speed, with price hikes to match -- for ships, if bigger than a destroyer, they'll use a tug and get the ship to you as fast as possible at the higher cost, but for the lower cost it'll be whatever the ship's speed is (with a single base cost for Fighters and Frigates). For items, you can request that they pack it among a bunch of smaller, faster ships (say, a fleet of Hounds) for an exorbitant cost, opt for the lowest possible price (and they'll stick it in an Atlas or something), or somewhere in the middle (Tarsus et al). Then, the final part of the dialogue would of course be the ordering -- and the buying screen pops up as usual, just with the caveat that you can only buy one ship at a time, and let's say that for items you'll have a weight cap based on your delivery option.
So now the NPC delivery service deploys their ships. The fleet sets out on the same day for fast deliveries, tomorrow for the medium-speed, and 2 days from when you order for the lowest speed and price (and this way, small ships still get 3 delivery speed options, to simplify the dialogue tree). And this is an entity in the world, tagged immediately as hostile to Pirates, and whatever you're hostile to (let's say this faction inherits your relationships, to keep it simple). Now, playing with this idea, I realized that to really make it shine, let's say that items can be delivered straight to your fleet, but ships can ONLY be delivered to any station on which you have storage (and have visited, if abandoned). A savvy player will know where their distribution centers are, and if they really want that shiny new Paragon that they just paid a million or so credits (after requisite fees, of course) for, they have to escort it, or else the fact that it's tagged as hostile to EVERYTHING will ruin your investment. And of course, they don't offer insurance.