From vauctions.com...
531FC) GREEK KINGS of BAKTRIA. Menander I Soter. 165-130 BC. Ĉ 
25x25mm (19.18 gm). Indian standard. thick heavy module; Ox's head 
facing / VF AND RARE
$17.00
February 25, 2007
Seller sphinx  
             
Estimate:  US $ 300

531FC) GREEK KINGS of BAKTRIA. Menander I Soter. 165-130 BC. Ĉ 
25x25mm (19.18 gm). Indian standard. thick heavy module; Ox's head 
facing / Tripod; monogram in inner right field. Bopearachchi Série 
29B; SNG ANS -; MIG 233c (uncertain control mark) . VF, green 
patina. RARE.