VkBrutaliaN

If you just want to hit 1000 you can go to PureSound and buy random 10yen sale items like shazna or L'arc singles!

You should focus on building a collection of stuff you can be proud to own, curating the collection is a good step to take too when you feel you've reached a large amount, at least I find a lot of joy in sorting the items and displaying the items I like the most from shelves and such.