Yongnuo Digital YN14EX-C TTL II Ringlight Flash for Canon EOS

Yongnuo Digital Manual Flash Controller YN560-TX for Canon $25 Yongnuo Digital Speedlite YN560-IV Flash [GN39M] $49

Canon Speedlite 200E Flash [GN65] $3 Minolta 2800 AF Flash [GN92] $3 Nikon SB-800 Speedlight Flash [GN125] $14 Canon Speedlite 430EX II Flash [GN141] $10 Nikon SB-600 Speedlight Flash [GN118] $13 Canon Speedlite 580EX II Flash [GN190] $16 Nikon SB-700 Speedlight Flash [GN28M] $19 Canon 155A Speedlite Flash [GN56] $5