Cardboard envelopes (Rhydycroesau SY10)

I have about 20x A3 35 x 25cm (13." x 10" approx) and 6x M1 29 x 23cm (11.5x 9") cardboard envelopes. These have been used but are in good condition and names and addresses have been removed. Ideal for anyone sending out books, etc. To be collected from near top of Racecourse. Kindly include a contact phone number in your response.