I'm pricing out my axle supplies and one supplier said he came into a lot of Powerlock lockers, and selling them for $479. He said they do have clutch packs in them, but are very easily rebuildable. How do these compare to a Lockright (what I was planning on using)?

The powerlock is a limited slip, not a true locker. Plus you would have to have your gears set up again (as the powerlock replaces the carrier, I believe). The Lockright is cheaper and easier to install

Go with the Aussie locker cheeper and better Qty.

Its not available for the Dana 60 yet.

The power locks are about the best LS around, and yes fully rebuildable. Not going to be like a full locker though. You can get a lockright for a d60 for around $300 if you shop around. I bought a D60 35 spline lockright for $309, so the 30 spline is prolly a bit cheaper.