Yes, I've just spotted the auction.
It is a worrying trend where eBay sellers assume that they can put anything whatsoever in their auction texts as long as they follow it with a question-mark. This is just my opinion, but if you head up an auction with the title "Holmegaard?" you're indicating that you think it might be Holmegaard, but you're not 100% sure. You can be 100% sure that it's not Holmegaard. It will be either Chinese/Turkish/Indian and will have been retailed through TK Maxx or a shop of that ilk.
I can say with absolute certainty that people who specifically collect Holmegaard cased glass, paying upwards of £150 each for some of the more common vases, will not be interested in this vase - and so you would be much better served with keywords such as Pip mentioned: 'funky' and target it towards the people who don't really care what they're buying, as long as it's bright and cheerful. The glass Holmegaard produced has nothing in common with this vase in terms of style, form or quality of manufacture.
Also, you're purposefully ambiguous about the age, when two separate professional dealers in primarily 1950s-1970s glass have told you it's pretty much brand spanking new. For the same reasons above, ambiguity doesn't add anything to the vase's appeal. And there's nothing wrong with saying a vase is new - you can even make a feature of it by calling it "contemporary" instead.
This isn't a ticking off of any kind, more of a suggested guide, as it seems you're pretty new to eBay selling and, I'm guessing, just copying what you've seen others do - but purely from the perspective of a glass collector armed with a little knowledge it would come across as lazy at best, and dishonest at worst - which would be a shame because you clearly want to know more about the glass you have by dint of being a member on this board.