This is the front driveshaft that I have been running in my truck since I did the 4L80E swap. I just had it checked over and greased up this week by the shop that built it, and it was completely rebuilt in March of this year. I've probably put somewhere around 5k miles on it since then. All greaseable u-joints. Good condition. $200 OBO plus shipping.

Some measurements:

39 3/4" end to end
5 7/8" spline length
28 1/4" center to first joint in the CV
31" center to second joint in the CV
33 1/8" center to edge of flange