Official Goldback.com exchange rate for 07/28/2023 is $4.04, up one cent since yesterday.
After a review of online sellers' prices, the best price for an in-stock 1 Goldback is $3.70 over at Defy The Grid defythegrid.com
The best price for an in-stock 50 goldback is $178.65 over APMEX
https://www.apmex.com/product/255963/50-wyoming-goldback-aurum-gold-foil-note-24k