where did you get a price like that..I am very intereasted
Note the date. It is 3 yrs old and the discussion stopped.
I wouldn't choose ebay for purchasing gear sets unless it is a mfr. Look at 4wd.com, 4wheelparts.com, vendors section under pirate4x4's bb, pull a magazine off the rack and look over the ads, look at your local truck parts supplier (not auto parts store - truck!), check your local 4wd clubs. There are lots of places to review for parts availability and warranty. For gears, you also best look for install capabilities and warranty on that as well.
Do note: be concerned with the ease of breaking axle shafts from insuperior designed stock differentials, gear ratio dividers within specific diffs which may require a case change, locker choices, upgrade shafts, brakes, etc. Since you will have the diff open, look into adding lockers (lots of levels to choose). If case swap is required, a case locker is an option.