Here are the current prices in CUC's, as at June 2014, for Havana Club and Legendario rum at the Holguin Airport Duty Free shop.   Be aware that if you buy liquor in the Duty Free shop they will charge you 1 CUC for the sealed bag they use to put the bottles in.

Añejo Blanco
50cl.......2.95
70cl.......3.85
1litre......5.20

Añejo 3 Años
70cl.......5.55
1litre......6.95

Añejo Especial
50cl.......4.00
70cl.......5.90
1litre......7.90

Añejo Reserva
70cl.......8.00
1 litre....10.90

Añejo 7 Años
35cl.......6.75
70cl......11.90 or 16.90 if in a box
1litre.....19.45 boxed

Gran Reserva 15 Años
1 litre.......150.00

Legendario
70cl Ron Dorado......7.15
70cl Ron Añejo.........9.75