I own a CX. The things to look for are:
Are all the drums "in round" and with smooth edges? Pull the heads off and check.
STM mounts or older version rod mounted? The first edition of the CX line did not have the STM mounts.
Does it include the 16" floor tom? For the price you mentioned, having the 16" is a must. The 14x12 can be a bit finicky and the 16x14 is a great drum.
The CXs were all wraps. Which wrap does it have. The best looking of all (IMO) were the blue onyx (Delmar's original Vintage Sky Blue Pearl - all late 60s and early 70s Gretsch, Slingerland and Ludwig offerings) or the white pearl. The darker blue onyx and black onyx are the least desirable of the wrap finishes.
I've had mine for 6½ years and back then I got the 22,10,12,14 & 14x5 snare shell pack for $600 and that included the 16x14 floor tom during a promotion they had. I picked up the 8x7 rack tom to complete the kit. When I received it, DW had tried to pawn off the older 5 lug version on me and I returned it and they sent me the 6 lug version right away. Good customer service.
Also it did not have an 18x16 floor tom option so I bought a shell and some of the same wrap from Jammin' Sam in Arizona and DW let me buy the lugs and rods and I made my own 18" floor tom.
For the money, they're as good as DW collectors, sound wise, they're just not custom so finishing and options are not there.
If you tune them well, they sound great and I've never had any complaints from anyone ever on there sound.
List the specs on everything you'll get for the $950.