I followed the discussion here a while and like to make a statement as a typical German customer/seller.
I did a comparison of an bay-offered VISHAY S102K 1K .01% PRECISION RESISTOR (Y00621K00000T9L).
(Note: Bürklin does not offer that part, at Arrow I simply wasn't able to find it).
Ebay US offers 2pcs for US $12,95 plus US $19,40 shipping. For Germany you need to add 19% VAT and 7% custom.
Taking 10 pieces as a typical amount of order to get free shipping (DDP) at Digikey, Mouser and RS-Components.
My finding:
173,03 EUR @ RS-Components
169,22 EUR @ Farnell 14
158,87 EUR @ Mouser
156,37 EUR @ Digikey
96,80 EUR @ Ebay
Taking into account not all parts are available at the bay, DigiKey hits the race of a typical bying.
Note: DDP means delivered duty paid, thus all inclusive no tax or VAT added later on.
PeLuLe