This is one person's opinion.
1. Many Cobra replica makers have gone out of business. That generally does not affect the value of their cars.
2. Prices for Everett-Morrison cars are about the same as many other small Cobra replica makers. It's value depends more on its condition and components than the name of the maker.
3. Your car would be a little less valuable than many here in the USA because the smaller 289 engine is less popular in the 427 body car. But that may be a plus in Italy where gas prices are likely much higher.
4. Like Italy, it is somewhat harder to register a Cobra replica in California than in many other places in the USA. So cars that are already registered there are more valuable to people who live there. You may find that your car is worth more after it is fully legal to drive than before.
5. Here's my wild guess as to the value of your car (in US dollars).
- Your car in the USA: $30,000 to $45,000
- Shipping to Italy: $2,000
- Rarity in Italy: $5,000
- Premium for having it registered: $5,000
- Total Value: $42,000 to $57,000
The value of a real Cobra 427SC built in the 1960s is likely more than $500,000. Some sell for millions of dollars.