Would be nice to see a price.

Sales

Sale 1: Sold for 50 keys

https://backpack.tf/profiles/76561198061489334#!/compare/1601769600/1601856000

https://bot.tf/stats/listings/Y96ZJGD0

Sale 2: Sold with 6 keys for Galactic Gateway Hephaistos' Handcraft (39 keys)

https://backpack.tf/profiles/76561198036203563#!/compare/1599609600/1599696000

https://backpack.tf/profiles/76561198061489334#!/compare/1599609600/1599696000

39 - 6 = 33 keys

Sale 3: Sold for 35 keys

https://backpack.tf/profiles/76561198109149008#!/compare/1599091200/1599609600

https://backpack.tf/profiles/76561198036203563#!/compare/1598832000/1599177600

Sale 4: Sold for Strange Wicked Wood Berlin Brain Bowl?

https://backpack.tf/profiles/76561198015668332#!/compare/1594339200/1596153600

https://backpack.tf/profiles/76561198109149008#!/compare/1594684800/1596067200

In that case, can be used there, as there does not appear to be a strangifier, and only recent sale there.

Marketplace sales

https://marketplace.tf/items/tf2/30755;5;u126

Nothing recent.

Current Classifieds

https://backpack.tf/classifieds?item=Berlin%20Brain%20Bowl&quality=5&tradable=1&craftable=1&australium=-1&particle=126&killstreak_tier=0

https://gyazo.com/0e313d876ae57899e3bdb59b575e200a

Summary

Sales at 33, 35, and 50.

Conclusion

50 does seem a little high, but eh, it was a pure sale, I'm not against excluding it unless another sale pops up at less.

Going with 33-50 here.

Take it easy.