T400

My old logitech T400 finally kicked the bucket yesterday. I want to replace it with something similar. I don't want a scroll wheel and the "new" t400 prices on ebay and amazon are insane. Id be willing to get a "new" t400 for around 30 bucks or so. but not the over 60 and in someplaces over 100...

my fighter/thief has 105 lock-picking but the icon is grey and i can't select it to open locks. what am i doing wrong ?