The weapon store in this game is actually quit good compared to other versions if you check often. I bought a Ein Calibur with 30 boost to power and +40 to hit and a whole bunch of levels later, I have seen newer swords with more stars but do not compare in stats.

Same thing with armour bought a scale arnor with 4 slots early in the game.

My dilema is I dont know if I should grind that sword or wait till I hopefully find one with more stats in both of those catagories.