Rising Star is largely about collecting cards, but some cards may be more useful to you than others. You need to take music lessons to get the skill required to counteract your increasing ego and most people opt to concentrate on one of the lessons. I do the production lesson which requires things like the laptop, looper and other electronic gadgets. I get a lot of other instruments in the packs I buy, but they gain me little. So I am selling off lots of them at bargain prices. You can see what I have available on NFT Mart. That is a great site for doing bulk operations.
I actually have more of some of the cards and only really need to keep one of each for the unique card count used in the rankings.
I am prepared to do deals. If you want to buy a load of cards then contact me on Discord to discuss. I will do direct transfers, so you can avoid paying a cut to the market. I have done this with several people.
I have been doing some crafting missions to try and gain more unique cards. I will be selling off spare drums and guitars. Those are open for offers too.
I am fighting for my place in the rankings with 
Rock on!