The sales have picked up slightly on Lakshmi. I think people are figuring out exactly what to use them for. I just mined one of these last night. Usualy a bout 3-4 sell per week but this week about 7 have sold. If they dont sell much its fine by me. 900k for 2 hours of work is good for me, and thats not including the other items i managed to dig up.
Just to edit the OPs message you can mine up Adaman Ore, Troll Pauldrons and Flint Stones in this area as well.
Flint Stone: Very Common
Troll Pauldron: Uncommon
Adaman Ore: Rare