Just a few things that I picked up, not trying to be picky or anything, and I am not saying it isn't worth $700.
Most DeRosa's of this vintage that were imported into the USA had SLX tubing (esp. in larger sizes) and most had both chainstays (but not seatstays) chromed. Chromed seatstays are shown in the catalog.
http://bulgier.net/pics/bike/Catalogs/de_rosa-88/
The chainstay decals appear to be too large.
It is missing the top tube decals.
Models with this headtube decal had similar stripes on the top, seat, and downtubes.
Not having the original fork really brings down the value.
The rear derailleur at best is Chorus. It is clearly not C Record.
The seatpost at best is Chorus. The C Record aero post had a distinctive top portion and more setback.
The brake levers are Cobalto, which are quite common, they have no quick release. They were not designed for these calipers.
The calipers are Chorus Monoplaners at best. The Monoplaners were available up until recently with the Veloce groupo. Of course C Record calipers were either Cobalto or Delta, but by '88 most were Delta.
I doubt if the cogset is Record. I could be wrong, but I remember Campy freewheels of this vintage being lightweight Al, and very expensive.
It is hard to see the shifters, but the oval shape suggests that they are not C Record.
The front derailleur is Chorus at best. C Record did not have that notch portion in the front.
I can't tell from the pictures what else the seller has lied about, but it would be enough to turn off many buyers.
It does have a flat front tire though...