97 LS400 - key will not turn past accessory, when attempting to turn off ignition, therefore it will not come out. I am able to crank car up again, back up, or move forward, turn the steering wheel several times, then it usually turns all the way off and key will come out. It has been doing this every couple of months for about 3 years. When I checked on having it repaired, it was going to be upwards of $1,500, new steering column, ignition switch, etc. Any suggestions on what could be causing this problem. 133,000 miles, no other problems.
