so much for selling on the forum huh? :p
http://www.ebay.co.uk/sch/amdg90/m.html?item=220998219403&sspagename=STRK%3AMEWAX%3AIT&_trksid=p3984.m1423.l2649&_trksid=p4340.l2562
here's the formula:
a*b
___
2
where (a) is the amount of figures
(b) is the retail price
and devide that by two for you ballpark figure
welcome to the *vintage* forum bit btw ;)