Where to find certain veins...Follow

See the little white box on the left of your screen? Try typing in "Tin Mine" or "Silver Vein" there and pressing the enter key. You might be surprised at how easy it is.

You can find an abundance of Copper, Tin, and Iron in Thousand Needles. You will find some silver, gold, mithril and the occasional truesilver down there as well but these are not common. LVL 27 will be tough unless you have some some stealth abilities as 27 is about the average mob level (26 to 29).

If you want to say in Barrens try the oasis pools around crossroads. There is not an abundance of tin or silver there but mob levels are low and respawn of minerals is reasonable. If you fish you can kill time waiting for the respawn catching deviates.

The last place I have used is the Razormaine(sp) Camps just north of the great lift on the west side. Again mostly copper but there is tin there.