We have a quantity of guitar/ukulele straps from a former music shop. All are brand new, most are loose (so no packaging) which means there could be very small marks etc. I've tried to show anything obvious in a further picture.

D'Addario Auto Lock (heavier nylon):

https://www.daddario.com/products/accessories/straps/guitar-and-bass-straps/auto-lock/auto-lock-nylon-guitar-straps/item/daddario-auto-lock-guitar-strap-black-7882/

D'Addario Auto Lock (lighter polypropylene):

https://www.daddario.com/products/accessories/straps/guitar-and-bass-straps/auto-lock/auto-lock-polypro-guitar-straps/

DSL straps are 2.5" wide leather with various colours of stitching. Standard lengths (100-148cm)

https://dslstraps.com.au/?s=SGE&post_type=product&filter_width=2-5&query_type_width=or

Ernie Ball straps are 2" wide

https://ernieball.co.uk/guitar-accessories/guitar-straps/polypro-guitar-straps#

https://staggmusic.com/en/products/guitars-and-basses/accessories/straps/

Any questions, just ask.