Retro Sound amp Co.

Has anybody purchased vintage tubes from, or communicated with, Retro Sound amp Co. (Australia)? He sells most typical pre-amp tubes (Philips/Mullard/Amperex 12AU7/12AX7/6jD8) cheaper than most online NOS tube vendors, and also offers vintage GEC KT66 tubes. I wrote to him a couple of years ago, he initially replied but then stopped answering my e-mails.

Any comments will be appreciated.