It hosts craftspeople, artists and gardeners for its third annual instalment.
Bowen, a specialist in Welsh and British furniture, offers the cupboard for £4850. Also available from his stand are a 16th century Welsh oak chest, a Carmarthenshire chest of drawers and a Welsh lovespoon.
On the 21st, the venue, Langathen Temperance Hall, will set aside its teetotal roots for an opening evening celebrated with gin cocktails by Jin Talog.