Are exclusives worth it?

I'm new to the world of toy conventions. I'm going to TFcon this weekend for the first time. I see they're offering this exclusive: https://www.tfcon.com/exclusives
Can someone explain the idea of exclusives to me? I assume they're only being sold at this particular conference, right? And does that mean they're more valuable? Is there anything else to it?
I'm a big Optimus Prime fan, but $80 seems a little pricey to me for that figure... it looks OK, not amazing to me, and there might be other figures I'd rather spend that money on.
Thoughts?
Can someone explain the idea of exclusives to me? I assume they're only being sold at this particular conference, right? And does that mean they're more valuable? Is there anything else to it?
I'm a big Optimus Prime fan, but $80 seems a little pricey to me for that figure... it looks OK, not amazing to me, and there might be other figures I'd rather spend that money on.
Thoughts?