Good afternoon,
A lot depends upon how quickly you want them sold.
If you simply want them gone, then around my area, south Birmingham, you would need to be ready to accept anything over £100 each. Ouch, that is not a lot, but both are "old" and many people don't like "old" carbon fibre frames.
The lifetime of a carbon fibre frame is massively disputed, but Specialized confused it even further with Zertz inserts, those clear "rubbery" things in the forks and stays.
To sell them at a decent price you will probably need to photograph everything, the brakes, the brake levers, the front and rear gear changers, the chainset, any defects in the paint, anything that has a logo.
The problem is that you are trying to sell enthusiast's equipment and enthusiast's often don't want second hand, especially old second hand and the non enthusiast sees just how much bike that they can get new from
Halfords for £400-£600
At this level stuff wears out quickly, chains (£20-£40), cassettes (£40-£100), chainrings (£70 [outer]), wheels ((£200)), rims get worn out by the brakes, etc. So you need to show a buyer that they're [edit typo] not picking up a bill to replace parts that is almost the same as buying a new bike.
So somewhere between mine and
@DCLane's prices seems to be a great starting point taking into account how long you want to wait for a sale.
Bye
Ian