Secret items can only give you neopoints, ALWAYS less than 100. The magic items are worth the most I think, although the best magic pot I've ever gotten was a Slippery Floor Potion. Good enough.
Re: What have you gotten on the 'Wheel of Excitement'? I almost always get the stupid '?' thingy or else the pant devil comes and steals my stuff :'( The wheel is useless to me, I feel like being robbed 150 nps everytime I'm dumb enough to bother with it. :|