I think Ivy New York is in hong kong. They have a lsrge inventory, perhaps they will have some heated with minor residues stones for you to compare agsinst? Otherwise I am with Arkieb I think Hong Kong has several open to the public shows towards the end of the year you may get an idea there -- unfortunately you will have to battle against the need to know what you are comparing against had a similar level of treatment (your stone is worth a small fraction of what an unheated one, or even a heat only stone would be worth) and the need to bargain for an accurate price at the show. Totally doable though, and sounds like fun!
I am also projecting arround >5k though. Heated with residues just isnt that rare.
I’d love to visit some exhibition in hk or singapore, I’ll check if there is anything coming soon..