| Yeah, the 2 most powerful crystals are avaliable at Yavin station, but you can only buy them after you have all of the Star Maps.
**SPOILERS BELOW!**
Visit Yavin station early on in the game and you'd find nothing going on, and not much things to buy, but make sure you visit all the same. Go back to the station after you get 3 star maps and there will be a bit of drama and (I think) some new items to buy - but not the crystals. Once you have all the star maps, go back to Yavin (before heading off to the Unknown planet) and there will be a situation to deal with. Once that's done, you can buy two extremely powerful crystals. Unfortunately since you can only get them after you find all of the star maps, you can only use them for the final 2 levels. They're pricey too so make sure you have at least 40,000 credits if you want both. |