It's not only Ebay. I was idly trawling Etsy and saw 1898/99/1900 1d's on offer for a bargain £1,000. They are Fair-VG at best (the first two arguably worse).
Edit: maybe they are a bargain after all - I've just seen a 1936 1d in Fair-Fine on Etsy for £27,300!! (No, it isn't an Edward VIII). I think I'll give up now.