Do you pay seller for packaging supplies?

I think it's the seller's responsibility to pack it safely. I have paid seller for shipping material on one occassion and felt cheated later. It's all up to negotiation, however.

If I don't have the original box, I tried to do a secure packaging with the materials I have on hand. My idea is to send what I would like to receive. It is part of a great deal, not just any deal.

I never ask the buyer for extra money in case I need to buy additional packing materials.

Just what I use to do.

Happy Holidays.

while in general a seller is responsible for adequate packaging, I have on occasion , as a buyer, offered some extra payment, particularly if I felt that
1) the basic price the seller was offering was very good
2) the original packaging might use some help to fend off UPS/USPS/FedEx.

In general if I ask someone to go that extra mile I offer some cash for it ... and the goodwill this generates has always paid off for me since all items I have bought have been received extremely well packed, and without any damage.