Perez is a target for Barca as they seek an emergency replacement signing for injured forward Ousmane Dembele.
"There are many cases of players who have not been playing much and then have resurged at Alaves," Joselu told MARCA Radio.
"I've told Lucas that there is no place like Vitoria.
"You cannot go to places like Barcelona," he added.
Such is the good form of Joselu that a Spanish national team is not out of the question, and it's something he doesn't want to rule out.
"For me, the national team is a dream which I'm still to fulfil," he stated.
"They say that dreaming is free, so why not?"