Attempted to teleport back from the Wastelands and ended up near some ruins a short distance from the entry area. Found that I was unable to move from that spot - had to reload an older saved game to retrieve my second teleporter stone.
"You can teleport back to Kroxy in the wastelands. He sells charms, spell books, potions and equipment, so I don't see a great need for other merchants."
There's only one small problem with relying on Kroxy as your sole merchant. He doesn't seem to have much cash on hand and doesn't seem to keep the cash that you give him. If, as I have done, you show up in the Wasteland with low cash reserves and intend on having equipment repaired, you will soon be in trouble if you get into any combat. I am unable to pay for repairs, unable to sell Kroxy the goodies I've found, and haven't even run into the nastier creatures yet. Sorry, but I do see a need for other merchants.