This Sunday lunchtime (24th. September) there is a trade fair of concertina sellers at the Henry Box School in Witney, Oxfordshire. A lot of major dealers including Barleycorn, Hobgoblin and Marcus Music will be there. It is part of the Concertinas At Witney weekend run by Hands-On Music.

Have a look at http://www.whitecottagewebsites.co.uk/homweekends/concertinas.htm
Although the event is for people attending the weekend of workshops, it should be possible to get permission to visit the trade fair.

Valmai Goodyear
Lewes Arms Folk Club