Since when does IPv4-addresses cost money? I'm pretty sure IPs are allocated for free if available and you have a use case for them? I know RIPE now want members to charge customers for IPs, but..
Ever since the big RIRs (like RIPE) have run out of IPv4 addresses to allocate - which was a couple years ago (ARIN was out 2015; and RIPE ran out end of last year - and that was already with quite restrictive allocation policies).
I see that RIPE is currently only giving out a /24 for free to those who haven't received an allocation before, so my bad.