The Roubaix would be a good choice but others can tell you about the spec and age of what you have found--And the price if required.
But there is only going to be one way to check this bike out and that is test ride it. If you are not mechanically minded there are some pitfalls in buying a used bike so if possible- Take a mate along who knows bikes.
But post pics and a better spec of what you have found so others that know the Roubaix can comment.
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How long was I in the army? Five foot seven.
Spike Milligan