Hi Stubbs it states on their website they post inhouse to keep cost down. But if the buyer is in an urgent rush to use mailboxes or another service.
Have never won with salesroom before, as I let a few items go with Hansons due to the possible mailboxes price on top.
I would hope my item wouldn't cost £30 to post.
I have had a MOC shipped from Wessex before via mailboxes and it was £20. Some auction houses that
offer in house packing are normally cheaper but they all have there own method and charge for the service.