I researched the least expensive option for acquiring the 12 Caesar Set, all Denarius, except Caligula via the VCOINS site. Also, someone is selling via ebay for 15,000 a set they picked up for $2500 via CNG. Nice markup if you can get it. The set I came up with is around $4250, but I confess they are a mediocre set of coins. I presume a bronze or provincial set would cost far less.
Via Vcoins:
JC Cr 480/4
$780
Augustus
RIC 180
$170
Tiberius
RIC 30
$200
Caligula
RIC 56
$295
Claudius
RIC 83
$1550
Nero
RIC 68
$250
Galba
RIC 54
$430
Otho
RIC 10
$350
Vitellius
RIC 66
$250
Vespasian
RSC 94h
$90
Titus
RIC 948
$70
Domitian
RIC 691
$85
Via Vcoins:
JC Cr 480/4
$780
Augustus
RIC 180
$170
Tiberius
RIC 30
$200
Caligula
RIC 56
$295
Claudius
RIC 83
$1550
Nero
RIC 68
$250
Galba
RIC 54
$430
Otho
RIC 10
$350
Vitellius
RIC 66
$250
Vespasian
RSC 94h
$90
Titus
RIC 948
$70
Domitian
RIC 691
$85





















