dr foster and smith sells them for a good price. shipping i think is like $25. never buy bloodworms from petco or big chain stores. they charge a lot. prefer to go to local fish stores. i get mine for $3 for the cube pack.
dan and jen, they are also a vendor on here. they can prolly give u some kind of discount. they also have live black worms and frozen blackworms and of course bloodworm and other frozen foods. we used to do live blackworm group orders from them.