How much is Spirit worth?
The physical Spirit fruit trades for around 10M. The permanent version is worth about 2.37B. In the shop it costs 3,400,000 Beli, or 2,550 Robux for the perm.
Demand for Spirit is 7 out of 10. That's high, so you should be able to trade it quickly.
What can you get for Spirit?
Fruits with a similar value make a fair swap. The list below shows fruits close to Spirit in value. Use the trade calculator to check a full offer before you accept.