I was curious about the probably of burgling class cards with some out of the box card generators and I just thought I would share it. I am not stating the power of these cards rather just throwing some data out there. All numbers are rounded to the nearest percent. Also this is as of Saviors of Uldum Standard.

Pharaoh Cat Has a 35% to give a non-rogue class card.

Violet Haze Has a 58% to give 1 card and 12% for 2.

Jar Dealer Has a 37% for a class card.

Ravencaller Has a 60% to give 1 card and 14% for 2.

Tanglefur Mystic Has a 36% for a card.

Swamp Dragon Egg Has a 37% for a card.

Fishflinger Has a 29% for a card

Weaponized Piñata Has a 54% to give a card

Lastly Face Collector 

Played 1 time is a 54% for a card

Played 2 times is an 80% for a card 29% for 2

Played 3 times is a 90% for a card and 16% to get all 3 as class cards.