Its a german unique cover and in the Top 100 ( but in my opinion not warrantable)
Its on ebay quite often (for THAT rarity)
Got my copy in a lot of ordinary LPs, together with Headmaster 12" and the "William" Whitelaw 12" for 20-30€ BARGAIN!!
But for sure you should be able to pick this item for about 20 bucks
I'LL HAVE A DOZEN IF YOU CAN GET ME THEM FOR 20 BUCKS EACH