There are two types of rebuilds.
Soft parts only
Soft and Hard parts
The soft parts are when a shop just replaces the clutch pack and bands...services the valve body, verifies all is ok, and then finishes the job.
The hard parts? That's when a shop replaces not just the clutch packs---but also the steel parts that often get scored or heat stressed...(also the springs, thrust washers, etc...In most cases we'd like to think that's part of the soft rebuild--but it all depends on the shop)
The price quoted including a reman torque converter? Is fair for a hard rebuild. I've found 'em for sale on eBay rebuilt without the converter going for about $550ish or so. (with a warranty that is a long one---so I suspect it's a 'hard parts' rebuild, cause the soft parts rebuild? Won't last much longer then a year or so.)
Others may have different opinions...this is just mine.
For what it's worth? I'm considering swapping out the A4LD out of my BII and converting it to manual come spring/early summer. (all depends on the money)
S-