Buy it.
As long as it's a decent fit, you'd be getting a great deal. Plus, it's a very low risk way of trying out road biking. You could sell it for at least the same price in a couple years if you don't catch the bug.
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"The older you do get, the more rules they're gonna try to get you to follow. You just gotta keep livin', man, L-I-V-I-N." - Wooderson
'14 carbon Synapse - '12 CAAD 10 5 - '99 Gary Fisher Big Sur