I’ve found that exotics and S Class ships tend to spawn more in Opulent, Wealthy, Prosperous etc, type economies. Especially immediately after warping into a system. Many, many times I have warped into a system, gone straight to the space station and landed, and the first ship that arrives after me is an exotic. It happened twice yesterday with a 16 slot Squiddie (green, very nice, but my own Squiddie is 19/6, so I took a screenshot and moved on), and again an hour later with another red, ball type exotic with gold trim. I’ve already seen these in other designs so again I moved on. Honestly my tip for good ships is get your economy scanner installed and warp into rich systems, head for the space station and land. If nothing appears within a couple of minutes, take off, warp, and try somewhere else. A note to this - I arrived in a system and landed but I was in my max slot S Class Hauler. A Squiddie landed, 20/6 slots…I couldn’t part with my hauler, so I took off straight away, called my freighter in, swapped ships and headed back over to the space station. An hour and a half later (lol), the Squiddie returned 19/6 this time, so I grabbed it. You can be waiting ages for a ship to return, and the slots and bonuses will always be different, so be prepared and always try to be in a ship you are willing to trade when visiting space stations for the first time. This method only seems to work when you hit the space station immediately after warping in. I hope this helps.