in all likelihood, Bill didn't edit his data from some other auction and the calculation is incorrect.
I'm sure the shipping charge is about $10 unless he is also adding $40 to cover insurance
So I wrote Bill asking about the 50.00 shipping fee AND it being UPS Ground Service for this poster:
Link:
SON & BRIDE OF FRANK RR OS (Realart) I suggested that this item (in a flat parcel), could be sent, via USPS 2 Day Priority for much less.
He wrote back, saying that he could also mail it Priority Mail, with Tracking, and the cost (from TX to CA) would be $6.50
He never explained tho, where the listed $50.00 price came from, or that it was a mistake/typo of some kind or that it was a combination of shipping and added insurance. But it's good to know he offers other options.