The Exchange at the AS220 Project Space. 200 Handmade black dyed Douglas-fir objects each being sold for $30.00. One, unmarked and indistinguishable from the others, contains a 20.06 –gram Alaskan gold nugget with a market value of approximately $1,010.82. Art exhibit? Retail store? Gambling? Perhaps a little bit of all of them and you have to ask yourself, why do you buy art?