I do realise this is a super old thread, but am hoping that some of these SIMMs are still in the sellers possession. I did check and they still frequent here last visit was 17th March 2020.
So anyway I am interested in a 8MB double sided SIMM, pending some questions, i.e. stock availability and you mentioned you'd tested them on a PC what did you test them with? i.e. memtest86+? I only ask as I purchase another 8MB double sided SIMM from another seller, but the RAM was faulty had various errors and keeps crashing my A1200, it also fails the memory tests in AmigaTestKit.