How much is Portal worth?
The physical Portal fruit trades for around 12M. The permanent version is worth about 1.8B. In the shop it costs 1,900,000 Beli, or 2,000 Robux for the perm.
Demand for Portal is 9 out of 10. That's high, so you should be able to trade it quickly.
What can you get for Portal?
Fruits with a similar value make a fair swap. The list below shows fruits close to Portal in value. Use the trade calculator to check a full offer before you accept.