bru, if you really want to bypass this security feature of your car (and I am not sure whay you would, since duplicating a non-imobiizer Volvo key is also very expensive), here's my idea. First take one of the keys that works with your car and carefully cut out the rubbery plasic at the top of the key. Be very careful, the imobilizer chip is in there and you DON'T want to damage it, just remove it from the key. Now that the chip (enshrouded in plastic) is separate from the key, tape it somewhere close to your ignition switch. Maybe on the inside of the knee bolster or something (you'll need to experiment). Now you have the imobilizer part of your ignition permanently engaged. There is a caveat, though. No other key with another imobilizer chip for this car will work, so you'll have to cut away the chip and throw it away for the key to work. This of course seems like a lot of trouble to save $50. Also, you will forfeit a really good anti-hotwire feature of your car. Volvo keys are very expensive even witout the imobilizer since they are pretty difficult to cut and no one except the dealer has the blanks. You just have to be careful not to loose the keys and if you do, you are out $100 (with imobilizer) or $50 (without imobilizer).

Good luck.
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Vladimir. 1998 S70. Base, 5-speed manual.