The seller does not have to follow through if there was an obvious mistake made in the listing.

Seriously, you don't see the ridiculousness in expecting him to honor what is an obvious mistake? People whine and complain about how entitled people are nowadays, and here you are, expecting to cash in on what is essentially a typo. Granted, he could communicate more clearly, but holding his feet to the flames because you think you deserve to cash in on his mistake is pretty low.

 

As for his pricing, if people are willing to pay it, so be it. Everyone suddenly turned into a communist when ammo got expensive!