Component cost minus PCB if you buy everything (except some of the pin headers) from Mouser is currently $39.78 AUD
Here's a mouser cart
5 PCBs from JLCPCB right now would be $35 with ENIG but if you really wanted to cut costs you could go for lead-free HASL instead with a price of $11.99 for 5 but I really recommend against HASL for boards like this.
Sorry I don't have any PCBs left or I'd send you one