There are still a couple of hundred tickets left.
Courtsy of the of the official website they are priced as folows:
RESERVED & EXECUTIVE RESERVED SEATING AVAILABLE TO CURRENT SEASON TICKET HOLDERS AND AWAY TRAVEL MEMBERS WITH PHOTO MEMBERSHIP CARDS ONLY.
Standard Reserved Seating
Adults @ £24.00
Seniors 60yrs plus @ £19.00
16 - U19s @ £16.00
Under 16s @ £14.00
Disabled & Carer @ prices as stated above and Carer free
Executive Reserved Seating
Adults @ £25.00
Seniors 60yrs plus @ £20.00
16 - U19s @ £17.00
Under 16s @ £15.00
Disabled & Carer @ prices as stated above and Carer free
Call 0845 345 1400 or book online
https://www.eticketing.co.uk/cardiffcity/default.aspx