I personally wouldn’t pay via gift. No offence to the seller, especially when they are a regular poster or known. The amount of sellers still asking for gift even after all of the threads about it and it being a sticky of the front page of the for sale section.
I always pay for goods and I’ll pay the fees, we’ll agree a price, I’ll use one of the online calculators and send the total, normally rounded up as well.
I’ve pulled out of sales when a seller asks for gift only, even when I’ve said I’ll pay the fees. Some will refuse to take a payment “for goods or services”. Which to me screams scammer.
Other peoples MMV of course.