'Red' Fiat keys were at one point around £1,000.
You're paying for the 6 digits worth of R&D needed to create a scrambled code locking system.
Enlist the help of a teenager, check Ebay and / or if the codes can be downloaded any other way.
The keys and fobs for my old Ford Ranger are also very expensive if you go through Ford but re-programming can be done without a computer following a procedure found on a forum - saved me £200 anyway.