Others have already made observations about possibly cast coins and not genuine but to answer the question for the OP.
“ If real these Antoninianus Roman coins of GALLIENUS, CLAUDIUS II GOTHICUS and SALONINA they are common coins and in the Reference Book SEARS Vol III range in BOOK price as follows:
FORTVNA REDVX types VF $12 to EF $45
AEQVITAS AVG, IVNO REGINA, GENIO AVG, VIRTVS AVG, types VF $15 to EF $40
FIDES AVG, LVNA LVCIF, VENVS AVG, VIRTVS AVGVSTI, types VF $18 to EF $55
CONSER AVG types VF $20 to EF $55
AETERNITAS AVG types VF $25 to EF $75
In terms of a MARKETABLE price being received for GENUINE coins that is likely (in UK) to range from VF $2 to EF $20 per coin.