1991 Oldsmobile Regency My Old Friend.

I was driving and my control panel gages shut down. I could not see how fast I was going or anything. I could still see my fule and miles gages, but my miles didnt change after it shut down. Then I notices once I stopped at a stop sign that my car had a hard time picking up steam. Then once it got past 35 it worked fine. I took it to a shop and they told me to junk it. Wasnt worth fixing! I love this car! I dont really want to junk it. I heard it just maybe the ECM. Is that costly and hard to replace or should I junk it?