I would assume all single packs are weighed unless you can trace the entire history of the packs and can trust everyone who has come into contact with the packs. Edit: Forgot to mention that some packs cannot be weighed. These are not those packs.
You could perhaps contact eBay and mention you suspect the packs may be tampered with. They might be able to cancel the transaction more gracefully.
Seller states he hasn’t weighted the packs themself, but pretty I am damn sure someone has weighted them in the past. Because who would sell 2 packs?
Got this back. The only reason why I started to ask after is because I only bidded ÂŁ50 for 2 ex emerald 2 gym challenge and 2 gym heros. So I sorta knew I should of not bidded on these. Will I lose anything.