This is the second Crossfire listing I've seen on Craigslist that said the timing belt was recently changed. As they have timing chains that last forever, nothing in the listing is believable.
Chrysler Crossfire load it with subwoofer system awesome body 125k
A different seller on ebay is listing a used SKREEM module as a tested Homelink.
http://www.ebay.com/itm/CHRYSLER-CROSSFIRE-HOMELINK-MODULE-/141192983478?pt=Motors_Car_Truck_Parts_Accessories&hash=item20dfc1f3b6&vxp=mtr#ht_63wt_1232
BTW - SKREEM modules, just like the keys, are linked to each car by a secret code, and will not work with another car.