Vision Trimax TT/Tri aero crankset.  110 (compact) BCD but with 52/38 aero rings.  BB30, 172.5.  Going for $80 to $100 used on Ebay, yours for $60.  Came off of a Felt DA4.  http://i.imgur.com/nnCfdew.jpg

SRAM Red 10 speed crank from 2010.  53/39, 172.5, GXP.  $125.

SRAM Red front derailleur from 2010.  Famous for being superlight and mediocre shifting.  I dunno - $10?  Free if you buy the crank?

8 speed Shimano 600 Ultegra front, rear derailleurs, $5 each.  Cosmetically good.  Front derailleur still has that tricolor Ultegra sticker on it.  Shifts crisply with 8, 9, 10 speed or friction

Shimano 600 Ultegra brakes.  Beefy, stiff, heavy, stops you real good.  Cosmetically good.  $10 for the set.

$15 if you take all the 600 Ultegra stuff. 

BicycleR Evolution Trailer.  This thing: http://arrivingbybike.com/bike-trailers/cargo-trailers/bicycler-evolution-shopper-trailer/
Hitch mounts between the quick release and rear dropout.  It will only work with older "standard" dropouts on steel or aluminum frame bikes.  The box condition is a little rough but functional.  Make an offer.