Viking and Scribner, various dates.  All True US first editions, first printing hardbacks in dustjacket. 

Libra, Viking, 1988.  19.95 price present on dj, no indication of later printing.  VG/NF  some spotting/foxing to page edges, generally only on top).

Underworld.  Scribner, 1997.  Complete number line, including "1".  Old ink stamp "Property of the Lofino Senior Center" on front endpaper and a couple of dates, but seemingly unread.  some very light bumping on bottoms of boards.  NF/F.

Valparaiso.  Scribner, 1999.  One light corner bump, otherwise near F/F

Cosmopolis.  Scribner 2003.  some wear to dj, otherwise F/F.

Falling Man.  Scribner, 2007.  possibly read once: about F/F.

Body Artist.  Scribner, 2001.  F/F.  Probably unread, and as new.

DeLillo, of course, is one of the major figures of US postwar fiction, and likely to increase in collectibility.  Get these now, while you can: cover price is about $130.00; I can offer these at about two-thirds of that.  Nice collectible lot.

Purchaser to include 4.00 for domestic media mail shipping (padded envelope); West Virginia residents must include 6% state sales tax.  PayPal preferred.