Exchange

Exchange suddenly won't take my candles. Says, Nothing is nearby...?

Candles are classed as 'Hardware' items. You can see what type the exchange is on the bottom left of the green border. For any exchange you own, you can go into Options menu then Exchange type and select between the various types. You can either switch when you want to sell, or set up two exchanges (I have dome this at the welcome area on Mintor)
Hope that helps!