The bulk are not because of the price drop. Its due to an official Microsoft offer to academic institutes which they able to process the order if the bulk is more than 500 pcs. Microsoft is currently clearing out almost 6 millions pcs of RT stock from their inventory as this stagnation cost them almost USD $1.6 billions loss.

Any seller will do IF they can provide you the copy of official offer to their respective institutes. And yes, unfortunately ETA is quite late. Probably in the middle of August.
p/s : The real price is RM 600+, so make sure the seller (middleman) so suck your blood too much