Had a run out with the Memsahib. Dropped into a garden centre that I do not normally visit.Selling cabbage plants, six in a container for £1-99. that's 33p each. Cheaper to order the finished product from Harrods.
Often is the case with veg plants. except if P & P is applicable.
As an aside, 6 plants for £1.99 is a bargain compared to some places. Seen prices of £2.25 and £2. 95 per 6 around this area. One nationwide chain of garden centres is the worst offender and what I have seen of the quality of their early stock has been dire.