789
Expert swordsmen
(startrek.website)
General rules:
Exceptions may be made at the discretion of the mods.
Even if it is damaged or broken, you'd be able to return it for the full price, because you did not get what you were promised (at least in countries with legal warranty)
Depends on how the product is described and what the warranty covers.
Like, if these are sold as decorative art pieces, swinging them around probably voids the warranty.
If they are sold as "replica swords", and the seller assumes this means "display piece" and the buyer assumes this means "larp-usable sword", the sale is null as no meeting of minds has happened.