Gehenna.
Situated six parsecs outside the Terran Empire the world is outside Imperial jurisdiction. It is also located in the middle of one of the richest subsectors IMTU and has one of the highest TL's and populations. It sits not stride the major trade route leading into the Terran Empire, but just one convenient jump to the side so it gets a lot of traffic. Because it is outside Imperial space and law all the major megacorps (and scads of everything below those) keep their primary R&D facilities there, as well as their HQ for legal and tax purposes. This way they don't have to worry about pesky laws regarding cloning whole organisms for organ replacement, I.A. development, chemical and drug research, psionic research, weapons, and all sorts of things that are highly profitable (vices and other) but regulated or forbidden in Imperial space.
The place got its name and start by having an ecosystem comprised of flora and fauna that are all venomous. Defensively, offensively, passively, actively, and even borrowed - everything on Gehenna is poisonous. Not necessarily aggressive or anything like that, just venomous and therefore not something you'd want to eat unless you figured out how to. For example, if you steep Bushpig meat in alcohol for 12 hours it breaks down the venom in it into a delicious flavor that also adds a mild euphoric feeling in the diner. At the Cossack Grill in the only real city on Gehenna (the other is the starport - half the planet away), Styx, the grilled bushpig is further enhanced by adding the quills of the Red Spiny Runner to add a slight touch of the psychedelic to the effect.
Scientists and corporate researchers saw a goldmine when they first landed there around 500 years ago and so the growth has been from companies moving in and setting up shop, while hiring personnel at excellent rates of pay. Harvests can be pretty hazardous, but worth the effort. Prime Heffalump hide alone is worth 4-5x what regular leather is before worked into a wearable product. Its not too hard to get, either, so long as you don't mind standing in swamps to strip it from living Heffalumps (it doesn't bother them as it comes of a layer they are shedding) while dodging Mad Cows, Crybabys, and the horrible Spindizzy swarms.
Anyway, the population grew and the Empire became a good trading partner, too, on the side because everyone could use a new liver or spinal nerve bundle sometimes, and who has the time to sit on a donor list? Organ-legging is a popular street level career among the population in Styx, too. The grubby urchin with her hand out for a few Credits might have a set of amped up Buzzknucks under the rotting knit mittens and zap you unconscious. Her handler with then drag you into the alley and strip you down for parts to stash in his freezer backpack. Of course, the urchin may end up that way, too, someday if her quota is down but life's hard when you're young. To help citizens protect themselves, the police post daily special rates for some of the crimes they'll investigate for you - and for the better parts of town they wander around and keep the riffraff under control.
To help citizens protect themselves Kemmer-Lansing's line of polymer One-Shot pistols out of vending machines and convenience stores near you. They come in popular colors, and even colors and badges of your favorite sports team! After use, return one to the store and they'll discount the next one while recycling the old one. Yes, it's that kind of town.
Anything imaginable, and some not so imaginable but still available for the right price, can be had here. Vat-grown slaves to order? yup Need a whole-body transplant? Contact your local rep form the megacorp of choice, or your local organ-legger if you are short on time and/or cash.
Privateer and merc crews and units hang out here. The yards will build you nearly anything for your ships, and smuggling is high art.
