i think if you want to be cost efficient using jac, you should patronize dvd selling sites that offer free shipping like amazon. so that you dont pay double for shipping. and no, jac does not treat dvds and cds as electronic, so its $6 per pound + $5 per shipment as handling fee. average number of disc per pound is 4 pcs.
but if you really insist for the cheapest, i think balik bayan boxes via sea freight is the cheapest because the biggest box cost only 70$ to ship but it will arrive around 1-2 months and of course since you cant fill up a whole balik bayan box right away, you have to pay consolidation fee to the company handling the balik bayan box for you.
How much ba usually ang consolidation fee if I go for balikbayan box?
With regards to JAC, even if you have packages from separate merchants, you will only be charge one handling fee as long as the packages arrives all in a week. I was able also to have 5 packages (DVDs sent in separate bubblepaks) from 1 merchant considered as 1 package (1 invoice) and 1 handling fee.
So, if you have several packages, make sure they arrive in NY or NJ in the same week para isa na lang handling fee babayaran mo.
I would recommend buying DVDs or Blu-ray at Amazon rather than at eBay.