Eh, spend your money however you like to, but this is where I draw the limit. Each new season brings a new high/low that ZOS is willing to go to to get their grubby and greedy little hands on as much cash as possible.
The Watcher is nice, looks cool, I thought about buying it, I figured it would be the usual 100 gems for a pet (which is still extremely overpriced, but eh ..), but 300 gems for a pet is nowhere in the same galaxy as "fair pricing" for digital goods with little to no production costs, when you calculate the gems-to-crowns-to-cash ratio (which is a stupid process to have to go through, but eh - again).
So yeah, roflmao was my initial reaction when seeing them trying to get 300 gems for this. I'm gonna silently judge anyone spending that amount of cash on something this ridiculous.