I would say $100 since its used and probably has no warranty! Oh and never get a DS anymore since they are not really worth it and the 3ds can play DS games... And also, before you get a 3ds, always check the screen and I mean in "3d" cause from my experience, most used 3ds has a scratch on the screen which really ruins the experience if you ever use the 3d feature
PC Specs: CPU: 7800X3D || GPU: Strix 4090 || RAM: 32GB DDR5 6000 || Main SSD: WD 2TB SN850







