here in ventura county napa is always a few bucks more! a little too late, but you can build your own at west marine. they have the lugs and crimps. i bought maybe 40' and made a few 6 gauge cables and paid about 175.00 with lugs, a few years back.
today west marine is selling 6ga for 4.09 which is close to what i paid.
if you used 6 gauge than add napa's labor cost.