Gene Simmons and KISS are the masters of squeezing every dollar from their popularity with a staggering array of official merchandise ranging from breakfast cereals to rubber ducks to condoms. Now fans can take their worship to the grave with the official Kiss Coffin (www.kissonline.com/kasket), available for just $4,700.

Elsewhere, cult film director and sometime Americana singer-songwriter Vincent Gallo (vgmerchandise.com) has an interesting range of goods available, including a Hopalong Cassidy bedspread he owned as a child and, for just $1m, a sample of his own sperm - in case you're interested, price includes all costs related to one attempt at an in-vitro fertilisation. All of this makes Madonna's step into the world of "de-alcoholised red wine" (www.celebritycellars.com/madonna.php) seem highly reasonable.