How much is Gas worth?
The physical Gas fruit trades for around 65M. The permanent version is worth about 2.31B. In the shop it costs 3,200,000 Beli, or 2,500 Robux for the perm.
Demand for Gas is 9 out of 10. That's high, so you should be able to trade it quickly.
What can you get for Gas?
Fruits with a similar value make a fair swap. The list below shows fruits close to Gas in value. Use the trade calculator to check a full offer before you accept.