I ask you to also look at the rest of the coins. Basically, these are rare or scarce coins, trial coins, coins, rare coins with stamp errors, etc.

Roman imperial 

Maximinus II Daza. 

AE follis Siscia mint, Struck A.D. 309-310. 

MAXIMINVS NOB CAES, laureate head right / 

GENIO AVGVSTI, Genius standing left, holding patera and cornucopia, chlamys over shoulder; 

Crescent-Γ/SIS in exergue. 

RIC VI,479,199

Reasonable bargaining is appropriate.

I ask you to also look at the rest of the coins. Basically, these are rare or scarce coins, trial coins, coins, rare coins with stamp errors, etc.