I have a ton of DS games too. While the sheer volume definitely ventures into collectable territory, the truth is most of the games on the system can be found for $10 used and $20 new. Due to this, it's really hard to pass up on some great games at such reasonable prices. I don't pick up many games made in the 80s and 90s anymore because it is cost prohibitive, but I buy DS games fairly regularly and understand why you do too!