I have 3 E36 M3 limited slip diff's for sale, two in excellent working order, the third diff is a parts unit.
Three unit package price: $2,295.00
The first unit is a full race diff built by Dan at diffsonline in the US with all the goodies (BMW motorsport 4.10 polished gear set, 3 clutch variable ramps with new clutches in 2011 and fittings to enable a diff cooler plus a Rogue engineering aluminum back to reduce weight, increase cooling and increase diff gear oil capacity to 3 liters.
The second unit is also a limited slip diff but a stock unit with a 3.91 gear set and stock BMW limited slip unit. The second unit is ready to install as a spare if you need to replace the diff at the track.
The third unit has the case, 3.91 gear set and limited slip unit but in pieces, I bought to use as a parts unit if needed.
I will sell all three as a package with a great price of $2295.00