Yes, quite fortunate. It looks like the two Basil Kirchins in particular are quite rare and/or desirable. I give myself a little bit of credit for uncovering these as, having seen he had a reasonable number of De Wolfe LPs, I suggested he may have some 10". I'd noticed them in Discogs while looking up the LPs. He initially said he didn't think so but obviously went rummaging in his store room and this is the second batch he's found. He thinks that's it now except for an outside chance he may have some 78s.
I guess this has been mutually beneficial. I've been able to start my library collection and got some very desirable records at a very good price. He's made a few hundred SGD that he may never have made had I not walked into his shop.
Having said that, I admit I've been lucky but, hey, I was due a bit of good luck