Mailing show posters???

[DCS]

Hey everyone... just seeking some advice/info for mailing Broadway show posters. It's time to sell off my collection (virtually every musical and musical revival poster from the past 25 years or so) and I'm looking for stiff/non bendable mailers for these 14x22 posters. I seem to recall that someone here had found some online somewhere. Any suggestions are greatly appreciated! Thanks.

[haterobics]

I bought these when i did the same recently. Shipped like 40+ and all made it to their destination unscathed:

https://smile.amazon.com/gp/product/B01CNAQPKS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

[DCS]

Thanks so much for the info. Very helpful!