I just had a look at ebay and there are 23 Bulk loaders for sale for $15.00 or less, I think bulk loaders have devaluated quite a bit, lots and lots of them for sale cheap, The cartridges? well, it is best to buy them new, Freestyle Photo in Hollywood has about the best deals going, they are about a buck each.

Bulk loader or using a string in the dark, Don't be afraid to "Roll Your Own"

Be sure and check with your favorite lab to be sure they are not afraid of "hand rolled" film, there are some labs that will just refuse to process "hand rolled" film because people have been known to hand roll 35mm color negative movie film, this stuff will ruin C-41 and E-6 chemistry in a heartbeat.