I think you'll find a lot of scepticism on this site about Nelson relics that don't have a cast-iron provenance. His heroic status was so great in the years after his death that all manner of items, including locks of hair, claiming to be authentic, were offered for sale. Known enthusiasts were targeted by unscrupulous dealers. Lady Llangattock, whose collection of memorabilia now forms part of the Nelson Museum in Monmouth, received dozens of letters offering Nelson relics for sale, many of them with little provenance.
One of the letters in the museum at Monmouth is from Horatia Nelson saying that she is enclosing a lock of Nelson's hair for the recipient. The lock of hair is not there, which is a pity, as it is the sort of cast-iron provenance that a true collector will regard as essential.
One item without provenance that nevertheless made a good price is this one:
http://www.dailymail.co.uk/news/article ... 0-000.html