I bought my full retail from ebuyer. At the time, they were not selling oem so looks a more official purchase now available. Now i see ebuyer have oem and not full retail. By looks of it, there is now about �50 difference so similar to Windows v8 pricing available at the time i bought but declined as there was no downgrade rights on W8 and needed W7.

Think the Amazon ones were mostly people recycling OEM licenses from 'scrapped' PC's.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).