I just purchased an extended warranty on my '99 in July with $100 deductible. On the last day in-warrenty no less. My experience - expect the dealer to quote "retail" unless you're dealing with Chuck or site sponsors.
The dealer quoted me $2,400 initially. But - every price is negotiable. I informed him I would be willing to pay somewhere in the $1,200-$1,500 range. The sales guy checked with the owner, countered me $1,800. I stood firm, mentioned something about loyalty and future Viper business. Came back with $1,500. I said deal. My only regret is I waited till the last minute.
Expect to pay slightly more due to year/out of warranty. If you get a quote in this range, it's a good deal.