How much money have you spent on ebikes?

[jag]

$75 Used 10 year old Specialized Stumpjumper
$500 Ebike motor and parts (Nine Continent 2709 hubmotor, Crystallyte 72V 30A controller, Cycleanalyst, thottle)
$500 72V 8Ah NiCd batteries.

Now of course I'm eying one of those 1000W BMC hubs, lighter lithium batteries etc...