Thanks to both - I should have been more clear this would be me selling to a Hungary resident. Complicating matters also was that I was considering using eBay's "Global Shipping Program". This still requires the seller assure the item is exportable prior to shipping to the GSP hub. The problem I've found (since discovered after reading some eBay forums) is that the GSP folks may very well decide because it is export controlled, and nix the sale and return the item to me (worst case). Because they (Pittney Bowes is the administrator of the program) are the ones then on the hook for the legality of re-shipping it, they are sometimes overly cautious
Anyway seems like more trouble than it's worth.
A year or two ago I sold a 3GHz scope to a person in Ireland through the Global Shipping Program which was caught up in ebay's system for uncertain reasons. They allowed them to buy it, then didn't let them pay for it, then through an invoice they could pay including a shipping rate through ebay's calculator.... which I could not purchase shipping for even when talking to customer service reps because of an internal block in ebay's system. It eventually came down to some automated export restriction flag which was completely bogus, but their reps seemed to be unable/unwilling to make it work.
I was also later told that while the global shipping program option can be added to any listing, there's a hard cap in value that they will accept - something like $2000 or $2500 - that you simply can't ship anything more valuable than through it. So yes, your item could be flagged for non export (though if they are using Buy It Now and can pay, I believe this means it's not flagged, and it's absolutely the case that their automated system misses things), but if it's just high enough price, you can't ship it through the global shipping program at all, and are forced to use the 2x higher rates for another carrier.
From that last pdf of the regulations, I don't think 1GS/s and 8 bit resolution is actually the limitation, but it is the most stringent that seems to address it. Much more reasonable limits of a 1GHz analog scope, a 4GS/s sampling scope, or a 60GHz bandwidth oscilloscope or scope with more than 6.4Gbit/s continuous recording capability are listed elsewhere in the document. The 1GS/s rule may be specific to digitizing parts of analog scopes, as it's in the analog scope subheading.