Expensive soft flex on UK ebay

Do any of you ever email the person who's bidding... "of course, you are entitled to bid whatever amount you'd like, on whatever items you'd like, but I thought you might want to know that you could get for a much better price", or is that crazy -- or even not allowed? I mean, it would be crazy if someone nominated themselves the ebay-police, and sought out such instances, but if you simply come across it in your shopping, is it in poor form to say something to the bidder?

Just curious, A

You can't do that, eBay count that as auction interference and will ban you if the seller finds out and complains (you have to be signed in on eBay to email someone as you can't get their e-mail address). I've found that this sellers stuff goes for very high prices. I paid just under 9 GBP for my 30ft reel of 24k softflex (0.19) and just under 7 GBP for the 0.14 variety with postage of $5.25 and delivery in 3 days from an eBay seller in the US, one very happy customer.

Cheers Amanda Nottingham, England