Of course, I know poetry doesn't make money. The buzz with a poem is, as either Coleridge or Wordsworth said , "getting the right words in the right order".
However, looking up my new book on Amazon, I noticed that my collection The Copyright of Land ,which sold at £5 when it was published ten years ago ,is now out of print and is changing hands on Amazon for £20 a copy. A shame I only have my reading copy left.
Of course, poetry is ephemera to a book seller and that's where the money is, not in the poetry but the rarity. Poetry has small print runs ,usually no more than 200),so a first edition can have value. Seeing my book listed at four times its original price was a good boost, especially as I now have a box of The Earth Singing to sell.