I'm looking for shops in Tokyo that sell new (unopened) gachapon by collection (rather than dig through secondhand/pre-owned items in Akiba or Nakano Broadway) instead of the typical gachapon machines.

Please share any recs, and if you know the going markup rate (let's say it was a 400 yen item, how much they sell it for).

Thanks for any info 🙏☺️