Well I cheated. I added a Bag of holding in my inventory early in the game.(the only cheat in this game.) And lo and behold in the underdark I put 5 drow plate +5 in there and ...walla when in pulled em out tosell them and reopened the bag I still had five drow plate +5. Has anyone else found this fortune making bug?
A word of caution... If your bag is doing this and you decide to replicate, do so in small batches or you'll fill up your bag making it useless to carry anything else.

I've heard of this bug, but it's never happened to me.
Wah.

It gets better... after I left the Underdark the drow armor turned to dust and disappeared. So when I pulled the gorgon plate +4 out to try it on... guess what? Yep Gorgon plate for everyone!!!!

Yeah, I have a scroll box that is currently reproducing scrolls of magic protection at a phenomenal rate. It's handy (esp. for all those lich battles) but still annoying coz I'm not a big fan of cheating (it has its merits but takes from the true gaming experience ) and that's what it feels like

I agree about cheating. Considering Ive yet to find a random encounter spot that actually brings extra cash for exspensive items, and I want every item available to buy!(to put in my stronholds treasure room(s) of course.) I accepted the supplementry income without spoiling the fun.Sure helps when you really want a girdle of strength and dont have 14000 g.p. or a pickpocket.