Up for sale is a Working, in excellent condition Saab 99t Lambda Control ECU. Part number-- 0227100014 . 

This unit is the original for 78 99 turbos and will also fit 1980 & 1981 900 Turbos (all rare cars at this point!! )  

As always your best bet is to match the part numbers with the part you need,  These units often times can fail and cause a no start, or intermittent non running.   Check for spark.  If you have spark at the coil, but no spark from the plugs, very frequently it's because this control unit has failed.