Brandon Aiyuk is still in limbo regarding a new contract with the San Francisco 49ers, according to ESPN’s Jeremy Fowler. The star wide receiver did not show up to minicamp and he might not be at training camp if things don’t improve. Even head coach Kyle Shanahan admitted this is just part of the business. But with the wide receiver market increasing, Aiyuk will stand his ground. “Brandon Aiyuk is the big one,” Fowler said on SportsCenter. “We know what the wide receiver market is now, it’s looking at probably $30 million and above and he’s considered a top 10 receiver now at this point by mo…