Official Goldback.com exchange rate for 10/17/2023 remains $4.05.
Best prices:
1 GB is 3.72 (check)
http://defythegrid.com/goldbacks/ref/6499/
1 GB is 3.75 (credit card)
https://finestknown.com/goldbacks-for-sale/
50GB is 184.63 at APMEX
https://www.apmex.com/product/218164/50-nevada-goldback-aurum-gold-foil-note-24k