I personally don't need anything at the moment but you should consider grabbing the following because they should be easy to sell:
Jackpoint covers
Side skirts
Sunroof motor (If the gear is good but the plastic housing is broken, it may be worth bagging but if the gear itself is shot, don't bother)
Sunroof motor cover bezel (only if the tabs that the screws go through are not broken)
Front & Rear Mesh (get those clips!)
Fog lights
Front headlights (only if in good shape)
Front grille
SVT throttle body
Shift tower out of the transmission
The hydraulic hose that connects the transmission to the clutch master cylinder (discontinued part with apparently no aftermarket manufacturers)
All engine compartment wiring harnesses
The ECU & PATS module (get the keys too if you can)
If it has a dash clock with PATS LED light, get it.
SVT Radiator (if in good shape)
Radiator cooling fans
The ABS unit if the car is equipped with traction control (must also bag the corresponding dashboard switch)
The big splash shield that lies just underneath the radiator
Keep your eye out for any aftermarket parts as Klasky24 pointed out. You might trip across something like a B&M short shifter, Weapon R stainless steel headers or the extremely rare Brullen Y-pipe (PM me if you find that Brullen pipe!).
I think some people have been looking for the plastic wheel well liners lately. Check the WTB requests in various CEG classifieds sections.
Get the VIN number and report it as having "gone to heaven" in this thread:
http://www.contour.org/ceg-vb/showthread.php?7321-All-SVT-s-Go-To-Heaven
After that, it's up to you how much further you want to push it.
The early dashboard assemblies are desireable for fixing the warp problem but they don't always resell quickly. If you were to bag the dash, make sure you don't miss the following on it:
1. Get the wiring harness
2. There are two blue rubber grommets that should be attached to large pegs near the center underside of the dash. These may get pulled off as you remove the dash and fall behind or into the ventilation. Retrieve them because they are very important (they stop vibration and rattling).
3. Keep the duct that connects the right side ventilation output to the central output (runs just in front/below the passenger side airbag). The later dashboards use a different duct.
If you bag the dash, might as well get both airbags.
Some people suffer the problem of the gas tank filler neck rusting out. There are three different filler necks on Contours:
1. Made before 2-2-1998
2. Made between 2-2-1998 and 5-16-1999
3. Made after 5-16-1999
The tank is bulky but as long as it is empty, it is not hard to pull the neck. I can't guarantee that you will be able to resell this quickly but no new filler necks can be obtained through Ford.