It's interesting that you found two Alettas for sale, configured as road bikes. The Aletta is actually a slack STA TT bike, originally configured with aero-shifters and a base-bar. If the particular geometry works for your (configured as a road bike), it's a fine bike and probably a good option for draft-legal triathlons; if you like using aero bars, it's an easy fix on this bike, since it's native STA is 76-degrees. Perhaps abit long in the tooth compared to todays carbon-fiber wonders, but I'm a fan of aluminum (my two roadies are a 2004 Orbea Lobular and 200? Orbea Aqua).

As far as the price - if it's 105 10spd, meh...that's a decent starting point. If it's 105 9spd, meh...still not too bad, though you might ask for alittle discount. (I still run 9spd on my aluminum TT bike, so 9spd isn't so horrific, at least to me).