price depends on rarity/demand. Full-back is now a highly demanding position requiring the same level of pace, football nous and ball skills as the rest of the out-fielders. Some posters still cling to "old school stereotypes, where "defending" out-ranks everything, no need for fancy-dan shit". Pep disagrees, single purpose players are obsolete on his shopping list, believes everyone on the pitch should be a complete player, able to adapt to every situation, be it covering team-mates, timing runs forward, when to act as decoy, when to change the tempo and more. This means that a player who fulfills these abilities are rare and therefore expensive.
If PG believes Cucurella is one then i dont give a fuck about the price.
Strikers are the lead singers, full-backs are often regarded as "Ringos", as in ten-a-penny make-weights. Unfairly imo, time will tell.