Is this item glitched? =/ Since none appear in Shops . Trades xD

Yep, glitchified.

Hmmm... so what is happening with it? xD Am I still able to sell it? :S & How much are they actually worth?

there is an achievement for feeding your pets 25 black candy bars.. the price has gone up.

You can still put them into your shop and just advertise it at the Advertising board, so you can make sure people know you are selling them :)

Ooooh, okay - thanks lol

How much should I charge??

The hover thing says about 9.5K and the average price in trades is about the same. I've seen some people asking for more than that but I don't know if they're selling at higher prices or not.