With that damage, especially the cracked CRT face (it's a writeoff, even if it still has vacuum) I'd be concentrating on demanding a full refund, including what you paid for shipping. You have photos demonstrating serious unrepairable damage due to completely inadequate packing. One layer of bubble wrap and some styro-peanuts does NOT cut it. The peanuts *always* flow around, leaving some side of the item up against the inside of the box.
It's the seller's fault, make them pay for return shipping if they want that wreck back.
Or alternatively, did you pay for shipping insurance? Claim it.
Leave deciding what to do with the scope, until the refund is in your pocket and it's settled whether you get to keep the scope. Only reason you should be opening it up is to take photos of the internal damage.
But do try to keep it, as a spare parts unit.
I collect 7000 series scopes and plugins too. I'd be really pissed with the seller about that. It's just negligence and stupidity. I've had a few similar shipping damages, always due to poor packing. In my early days of ebay buying I'd be polite about it, but not any more. Make noise! Teach the slackers a lesson.
Btw, which carrier were you using? I find TNT very good and haven't had a single damaged item with them. Even stuff that was very badly packed (exposed carry handle on a vintage logic analyzer!) got here from USA undamaged thanks to their careful handling.
Edit: Ebay seller electronicscafe is pretty high volume, they have about a 0.67% negative rating for the last six months, and they do (claim to) give full refunds sometimes. But check their time limit for claims.
http://feedback.ebay.com.au/ws/eBayISAPI.dll?ViewFeedback2&userid=electronicscafe&iid=-1&de=off&items=25&which=negative&interval=180&_trkparms=negative_180