Pier 50 Trading Co, Anybdy got contact email

I think you'll need to contact them using the 'Contact Seller' link on eBay. As far as I can see they have no 'business' information on eBay pointing to an office or premises, nor does a google search produce anything but their eBay listings.

eBay will make it very difficult for you to deal with them outside of the site though. They do not like contact info being exchanged, potentially cutting them out of their slice of the cake.

 

Fully agree with @SmokyDave, easiest way is to contact them on the eBay platform.

Just a little side note: it's funny as they list many posters 1) without giving credit to the original producers and 2) for a higher (even 3x) price.
Check this as an example:

https://www.ebay.com/itm/203514689894?_trkparms=aid%3D1110002%26algo%3DSPLICE.SOI%26ao%3D1%26asc%3D20201210111451%26meid%3D1d0e287b5f94412da3acfad52005a96a%26pid%3D101196%26rk%3D8%26rkt%3D12%26sd%3D203503410111%26itm%3D203514689894%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DPromotedSellersOtherItemsV2WithMLRv3&_trksid=p2047675.c101196.m2219&amdata=cksum%3A2035146898941d0e287b5f94412da3acfad52005a96a%7Cenc%3AAQAGAAACAApXeEQGHj8jwf4eF06%252Fnq8SK3dQ5b7D8xz5aKosNAofKEYhiwhZveb5Vp0ABGapQ3DKb8EOh95yrNRfgQvOnpKuHsa%252BU4RgC%252B90kh6OMVfPHdf7j8o95aBVUt7%252Ba2ORQ9Ki2b9GEaWaRiDXy7h9eyR8GYsLNzMB5%252FiRLixN7OdDbLA1CKY2xiU18Qi6j%252FRzeXUiLq0nzBj0qXWfO5i%252BBcoPiYrxIlLpqXYTyXzhRj9I8ICJhOqv3NVzgDrcpJftm0UQKXKc1ZRV4q%252BO%252FVHMBO%252FbrniGI%252FOjPQsP95zS4iczu8He9MpdqUbxLfZDNyK%252B5DEIoLH7eIQhGhT1BjUVmOQ98yKjKe41DwYXcwB4uyMc9yqTRCN8jHQ3K8lrMG7FGswGaVKwiHS75IJLR2ipesguHnRJ%252BHVgnCHfruvTQcoKDQpLfhr%252FGkqvDDDzhPkY%252FOn4q%252B6%252FMN0fnlkrehkV1M6dPcHzx3nAeUJdkPIWzzprtxiXd1UF9%252Bg1RMyk54w9Y1VWnUimh16HJW7jHMjcWq%252BnnAhX9SRB%252BfyVchnUE9%252BGI%252BQ3IJaGpdk7TysM8VDKxE68cW%252FBWz6ZRKVkGfuXxZf2gMDJfz1ua1Uk9u%252FmjDOqITXN0YCFqx%252FcSXEUDpmxMGi3nvTntC4rkyN92qk9RP7oPBFfFHj2AQD3KaGKIfxy%7Campid%3APL_CLK%7Cclp%3A2047675

and the same one from the original maker:

https://automobilist.com/ferrari-250-gto-blue-targa-florio-1964-collectors-edition/

So, what's the deal to buy it from eBay?

 

This just proves again that buyers should always do their own homework. Many sellers on eBay have things way over priced due to either ignorance or greed. And conversely, you can still on occasion find absolute bargains on rare items their. A little due-diligence goes a long way. That said, since they are not making copies of the posters, just selling the original posters, they have no obligation to credit the producers of the posters. Yes, they should, and it would help as that is basic sales 101 of giving good thorough information, but they may not want to for fear that anyone can then do a search for these, and find them somewhere else at correct lower prices!