Let's see here. We have a seller who claims a camera to be in mint condition, yet includes a preface that descriptions are determined by a visual inspection. However, they do state that shutter is firing at all speeds. Quite honestly, this literally means that the shutter is only firing... even if not accurately. I believe that discussing the interpretations of "firing at all speeds" is rather ridiculous. C'mon, we know what that phrase implies. It means that the shutter appears to be "releasing" at different speed settings. NOTHING MORE. The seller also states that the meter responds to light. Are we to assume that the meter is completely accurate? I mean, it seems that most of the previous contributors believe "firing at all speeds" should mean the shutter is working 100% correctly. So, shouldn't "meter responds to light" signify that the meter works 100% accurately? Remember, the seller ALSO stated that the camera may need adjustment. Let's face it, this camera was described perfectly fine. It DOES need adjustment. It WAS sold "as-is".
This is the downside to auction sites. Items can be described as working, but if the phrase "as-is" is thrown into the mix, you will be stuck with the camera (unless the seller is kind and generous). I purchased several cameras stated to be 100% functional off of Ebay and even photography forums, and have been seriously disappointed with the outcome. On the other hand, I've had several fantastic deals as well. One should assume all cameras sold on auction sites will need serviced/repaired if sold "as-is"... despite what might be stated in the description. Decent cameras from decent sellers will be sold with a money-back guarantee. If the seller can't stand behind a description of "mint" and "firing at all speeds" by selling it as-is, why should the buyer assume the camera is accurately described?
So, what should you do? In the future, only assume a camera is working if the seller will allow a money-back guarantee. Besides, it makes everything easier if there is an issue with the camera. Right now, you could try to get your money back if the shutter is not opening at all. However, unless the seller is feeling guilty, you'll likely fail in this quest. So, leave a negative, and assume that you'll get a negative in reply. If you sell lots of items on Ebay, have a separate account for selling, and another for buying. This way, you can leave honest feedback without holding back any punches, yet still have a good feedback if you ever decide to sell something. Who knows, maybe this is against Ebay rules. However, if Ebay isn't going to look out for its users, then they'll have to look out for themselves.
Remember, auction sites like Ebay are great places for great deals, but it's also a great place for sellers to list defective merchandise with vague descriptions. Also, its a great place for people to list items that they aren't familiar with (believe it or not, but some people don't know everything there is to know about photography and cameras!). Some insufficient descriptions are honest mistakes, some might be the result of glossing over defects with "mint" and "as-is" in the same description. It's up to the buyer to figure out which auctions to avoid, and which to consider. Knowing what to look for will protect the buyer more than any Paypal or Ebay protection policy could ever pretend to do.