If you a follower of the Path of Light then why on earth would you need lockpicks? Heh, nevermind, I guess sometimes the end justifies the means ;-)
Ruin Tingalf only after you get all the lockpicks you want. However, if you need lock-picks now, try trading with any Tom, [nocando] and Harry - you may be surprised at what they have. A few shops in Verditis does sell -- maybe you want to try the Thief's Guild and complete the quest for the Magical Lockpick.
