I've had one or 2 sitting banked that I got awhile back for 150g-200g a piece. I think I've re-sold at least one since then and kept one if I ever decided to move my lock up to 39. I wouldn't ever pay anything like 2k for it though, 400g max for me.
I see a lot of people rocking out umbral crystal and sacrificial kris of shadow wrath with soulfrost on it instead of SoJs. That nets you more overall shadow damage, you drop the 11 int and spi (spi is pretty garbage for locks in pvp anyway) and you gain 5 stam 2 sp. It also used to give you more shadow damage when umbral crystal was just straight shadow damage instead of SP. SoJ was mostly bragging rights imo, and kiddies /epeen'ing over having a purple, or if you were running destro with sunfire. I've only seen that once or twice though.