Sorry you've got no PC love. I've had some good rides with the Emerald Coast Cycling Club while on vaca's in the area, and there is (was) a pretty active tri-club in the area, too. (not that I do those things).
But back to the bike. If that bike had some 105 or higher STIs, $450 might be reasonable (with matching tires). But not for a 1990 DT shifter-equipped bike in that market. A little N of you in B'ham I could probably get $300 for that bike if I really presented it well, in the Spring, and was willing to wait for the right buyer.
I took a quick glance at your CL and found a couple I would consider better buys, but they were smaller than the one you linked.
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72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff