Like everyone else said, dealers prefer you finance so they won't give a rat's a$$ if you pay cash. If you have the cash I agree with TwinTurba's advice - you would save a lot more money if you bought a gently used Elise. As soon as you drive the car off the dealer lot it depreciates. Most almost-new cars are still worth more money than what most folks have so the seller has a hard time finding a buyer, therefore they usually have to take even more of a loss and sell the almost-new car for less. Then will deal down even less if you pay cash up front. Just buy it from someone who hasn't tracked it and just "thought" it was a cool car to own but then realized they didn't like it as a daily driver and it was too racecar for them and the wife hates it, etc. so they have to sell it. Bring a mechanic to inspect it for damage/lies they tell. CarFax it, etc. For a little looking and effort you will save a good amount of money that you can instead spend on aftermarket performance upgrades.
My very long 2 cents...
Daily driven '05 Elise, Katana SC, CharlieX tuning, Seibon CF front clam with custom paint, Stage II exhaust, hardtop, Starshield, Pioneer ICE, dry CF door sills & panels, dry CF binnacle, color matched center console and surround, Sachs suspension, Moroso oil pan, EBC greenstuff brakes, Team Dynamic wheels w/ R888's
PhlypSide quote - Tell people you prefer your cars to be like your women: "lightweight, fast, low maintenance, and easy on the eyes."