well .. GEM did beat Houkago Princess and Batten Show Jo Tai on the billboard chart
They got 6th with 17,439 sales on Billboard
http://www.billboard.../detail?a=salesBefore you start celebrating ..
Do note that generally ..
Billboard count significantly less stores than Oricon
Billboard counts around 3,900 store while Oricon counts 23,800 stores
and Billboard do count digital sales which Oricon does not ..
But for my very flawed but "hey I tried" view ..
Let me do a long explanation ..
Most of GEM sales come from mu-mo event and mini live event
mu-mo events are those for example buy 10 copies for a individual 2-shot and 11 copies for a group shot ..
Mini live event are where they have handshakes when you preorder their CDs.. this events are ran by major retail record store like HMV, Tower records ..etc
Genrally speaking ..
Billboard count mu-mo which is the event sales while Oricon counts mu-mo too but now they count as 1 per purchase ..
But Billboard counts digital sales but not Oricon
Oricon should count their mini live event sales as it is tag to major store assuming that they are not counted as event and come under the normal retail rule ..
Oricon in past did came up with a rule to count events at cap maximum of 3,000 copies and they got around it by using major stores as it does not count as event sales..
There was a new rule for Oricon last year that for retail sales it is limited to what is "reasonable to society" and we can see them restricting purchase to 40 copies per purchase for those mini live handshake event ..
So with all this assumption ..
To get sales figure close to what was in the past Oricon numbers ..
Billboard - digital sales + Oricon - number of mu-mo purchase
17,439 - <digital sales> + 10487 - <number of mu-mo purchase>
So anyone want to fill in the blanks?
For me .. I do not see them getting anywhere more than 3000 digital sales and I do not see the number of purchase going pass 500 ..
So basically .. I estimate that their sales should be around 23K at worst