A Magic Carpet

I’ve been doing shopping for several months for J, it always mainly liquid items that fill the shopping trolley so it barely moves. Most weeks though there is one difficult to find item - in recent weeks it’s included dried tamarind, and carbolic soap. This week’s was to find as big as possible piece of carpet but I had a £5 budget! Alas, nothing within budget was to be found within the Aladdin’s caves of shops along Deptford High Street