Electrical problem
1985 Toyota Supra 6 cyl Two Wheel Drive Automatic 100000 miles

Car was driving fine until all of a sudden, it appeared to slow down. It then stalled and now it will crank but not start. While cranking, the engine seems to want to start but it doesn't. After cranking, there is a strong fuel odor. Changed spark plugs, wires, cap and rotor. Same thing. Pulled a plug wire and grounded it and seen a slow yellowish spark. There seems to be a longer than expected pause between sparks. Toyota says it's the igniter with a very hefty price tag. Looking for the 2carpros opinion. Please let me know what to check and how to check it to find the problem.

Thanks in advance for any help you can give.