Could you use a little advice on recently delivered speakers..

Hello Sifter, 

If that is a loose binding post it would be prudent to tighten it back up.  As others have noted on this post you may need to access that hardware via the front by removing the woofer (or other bits).  I highly recommend that you use non magnetic screwdrivers for any screw removal, especially those located near the powerful woofer magnet.  That magnet can "snatch" an ordinary screwdriver right through a speaker cone or surround.  I've had good results with CS Unitech non magnetic drivers.  They are readily available.   If a loose binding post is the only issue you made a great purchase.  Enjoy the music.  

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OP

in my opinion. your seller did not DO what he had to do to ensure a good packaging

I for one sold high end audio gear in eBay before i got into audiogon

I pack the gear i am selling with lots of bubble wrap. I do not rely on UPS or any carrier

so, in the end my clients where extremely happy that I overpack their new toys

enough said. 

Plus, the speaker connectors he may have not disclosed that clearly

I would count your lucky stars they weren't totally trashed by UPS and listen to Wayne of Acoustic Energy and do exactly what he said and be careful as someone above noted about the speaker magnet attracting any wrench you use. You might want to get a plastic wrench to be perfectly safe after you break the bolt tension with a metal one. 

Some drivers have a rubber gasket around them on the back side to provide an air tight seal if the speaker is an acoustic suspension type. 

Just take your time and document exactly what you are doing (take photos) so you can be sure to put it all back together.  

You may even find that the speaker cable needs to be resoldered in place. 

Good luck. 

Thank you Moonwatcher, and thank you all, some good advice. here.

@roadwhorerecords  I doubt the OP will hear a difference from that speaker if someone stands behind and wiggles the speaker wire/loose connector.