Olmo made a wide range of bikes from High to low end etc. I am hard to give you an evaluation without any pics...why not get your post count up by responding on the "introduction" SF?
You might also take a look on the net to see if you can find your particular bike there in order to see where it might be on the Olmo food chain.
Condition is the key to classics and the prices that they bring...Pantographs are a good sign but lack of chrome leaves me wondering but I have seen nice ones without it...check it out and if you like it offer less, you will be putting in around 100.00 unless the seller has already put new tires, cables and done a complete regrease on it.
Good Luck, Ben
__________________
"EVERY PERSON IS GUILTY OF ALL THE GOOD THEY DID NOT DO"
Voltaire
Voice recognition may sometimes create odd spelling and grammatical errors