Buy it. If you think you might be interested in this type of game then it's everything you will hope it is. It has become my most played game on Steam by a comfortable margin (About 600 hours).
It has all the trading, shooting, mining, exploring shit that you would expect but it's the SP/MP system and the community that makes it. Some of the stories that a mate who plays it told me got me totally hooked. In case you don't know, you can play the game in SP but at any point you can just switch modes into MP and you will appear along with everyone else. Or vice versa. So, go out exploring in SP and run out of fuel? Jump into MP, call the Fuel Rats (A player group) and they will come and rescue you. Some of their rescue missions are epic. There's guys who are months (real time) away from civilisation and they have been rescued. The realistic, 1-1 representation of the galaxy gives you a real sense of scale. I read about the Cats Paw Nebula in some article. Thought, "fuck it, I'll fly there". Took me 3 days and represents by far my longest "trip". I barely scratched our galactic arm. There's guys who haven't seen another player or even a spacestation for years
Here's a mind-blowing fact for you - Elite Dangerous players have discovered (ie. Visited and mapped) 112,000,000 star systems in the game. Which is only 0.028% of the systems in the galaxy and therefore the game. If you discover it first you get your name on it btw. If you're ever in-game pay a visit to the BLU EUQ IG-W C15-19 C system. It's got my name on it
You can also play with friends/groups. A bit like MP but invite only. Like a private server. I play(ed) with the Mobius group. It's a group about 100,000 strong so plenty of people around in the busier systems (like Sol for example) but PvP combat is not allowed. Means you can chat and do PvE stuff without worrying about the Murderhobos that plague many of the systems. Unfortunately there is a thriving community of guys in pimped out dedicated PvP ships who slaughter anyone they see. It's impossible to compete unless you're in a similarly dedicated warship so your only hope is to run.
If you get it gimme a shout. I might let you sit in the co-pilots seat of the Yawning Angel (my Federal Corvette) or the Gunboat Diplomat (my Anaconda).
Oh and it's a screeshotters dream. I should probs upload a few and post em. It's a gorgeous game.