Used 58cm Specialized Allez Comp
This is a fast and fun bike that’s in new condition.
Probably a 2009 or 2010 model, the aerodynamic frame is stiff and fast. The components (front and rear derailleur, shifters, crankset, bottom bracket, brake calipers, chain, cassette) are Shimano 105. The wheels are Fulcrum Racing 6 models, and you have Specialized making the saddle, bars and stem.
It’s a 58cm size, so it should be ideal for a cyclist between 5’9″ and 6′ tall. New this bike would have run you around $1600. It can be had for only $899 today.