Warcraft III cd-keys go for about 200 per key. So a set would be 400.
HoN keys are 400 because only 1 key is needed and u get the whole game.
Starcraft is like the same as HoN since there is only 1 key, it is around 400.
Diablo II is a popular game in D2JSP so the keys for Diablo II would be around 500+
BUT with those prices, the prices randomly go up and down because of the demand.
Also people give discounts.
Sorry if this is illegal but I just thought people would know.