I bought a pair of K-1000s from Blackmore. Excellent communication throughout, fast shipment, very smooth transaction. Item was packed very well for the international shipment. I would definitely deal with Blackmore again.
He did me a great favour with my K1000. He e-mailed RW Soundsystem (AKG Germany service company) on my behalf (I didn't even ask for his help but he was amazingly great to help me anyway!). He talked to them regarding my headphones which required servicing of the right channel.
Sergei even offered to mediate all my transactions with RW Soundsystem by helping out to do a BACS (while I paid him with my UK PayPal account).
He responds amazingly quick (he is ALWAYS on Head-Fi) to my PMs. He is very accommodating and very honest. I couldn't thank him enough.
Bought fully modified AKG340's from Sergei. Excelent product just as described. Good communications. Dutch post messed up the delivery but that is not Sergei's fault and he communicated with me as soon as he knew about it and resend them. Recommended seller, would do business with him again.