Hmmm off the top of my head I cant really think of that many. A couple of Human League records, perhaps and some Depeche Mode rarities.
HL: Original copy of Being Boiled from 1978 with the newsprint label, the follow up Dignity Of Labour EP on 12" with the flexidisc.
DM: Some Bizarre LP from early 1981 featuring an early version of Photographic. DM's first ever release. Also had early Soft Cell, The The and Blancmange recordings on it too. And I seem to remember having a copy of Sometimes I Wish I Was Dead on red flexidisc also from 1981. I dont have the FlexiPop magazine anymore unfortunately but it had this ace picture of Dave Gahan in a coffin waving a cross at you.
The Cure's Lullaby on 3" CD is quite rare these days too.
Not necessarily valuable, but rare for sure.