I would suggest that the old Penn linen is a superior option as well, if you can find it.Cork wraps feel great but as pointed out, sometimes cork wraps will dry out over time like cork on a wine bottle.
Resale value is not helped by a cork wrap. In fact, it probably limits the resale interest and resulting sale price.
Now Cortland linen, if you could get any, helps the resale value because it’s hard to find any still in good shape.
Other linen wraps are so inferior that you are much better off with a leather wrap than a cheap linen wrap or cork.
Finding Cortland can be done. Whether or not someone, a cue maker, is willing to sell/install it is another matter.
I remember a story a while back where a prominent maker told someone (implied?) he had none left. But turns out he did. He just wouldn't even say outright that he had it unless the cue in question, and maybe the customer, was right for the linen. He wasn't lying as much as just playing his cards close to his vest.