Hello, all! Just thought I'd share in case anyone was interested.
I was looking around again today, and found the Leather Therapy Leather Laundry Solution for $30 a gallon.. I truly am dying to give this a try (Is this the brand you use, katev?), but I can't trust my bags to our washer since it has that central agitator (versus front loading). Seems to be a pretty awesome price, as last I checked, it was ~15 for a smallish bottle that was definitely not half a gallon... I don't know what shipping costs are though - I always go to the B&M store.
http://www.bigdweb.com/LEATHER-LAUNDRY-SOLUTION-GALLON/productinfo/1200LG/
That is the stuff I use and that is a great price!