One clarification in case you misunderstood: If they give you a salvage title, they have totaled the car. You would need to reregister it or sell it. The normal procedure I understand when a car is totaled is the insurance company pays the value of the car, plus the cost of registration, minus the deductible. Then they may offer to sell you the car on the salvage title, usually at the average for the recent salvage auctions for that car type. This would be entirely at your option, if you decline to buy the car back the insurance company will have it towed away.

All the above seems to have at least a little room for negotiation. In my one experience of having a Jaguar totaled after hitting a deer, they asked me what I thought the car was worth, and I quoted mid range book, and they agreed to that. If your car was in truly great shape, you could probably argue toward high end book.