between the cleanliness, italian frame, and my market, i would probably ask more but the most important thing is covering your costs. if $450 covers your costs and gets you a bike that fits faster you have lost nothing.
i second the frame trade thread. if i were in the market i would strongly consider that frame (pending tt length)
Really nice bike! Considering you bought from a dealer, you did extremely well picking up that bike for $450. Dealers around here charge 50% to 100% higher than what I am able to get for the same bike. They have done this on bikes they sold for me. There is no way I could buy a vintage bike from a local dealer, and a couple of months later get out in one piece without losing quite a bit of $$. Congrats on a good buy.
I do think the value has been dialed in previously pretty well.
"I have Tommaso Super Record in 61cm frame that i would would be willing to trade for a Bianchi or another italian bike in 58 cm . the bike rides awesome and has the Shimano Sante grouping value approx. 500-600 $ iam open to any offers ! here is a pic"