If supply of a product is free, but limited in quantity such that only half of the market will be able to obtain the product, what does the supply/demand graph look like? (eg. 1000 in market, 500 products)
If the remaining half of the market (ie. 500 buyers) have to obtain the product elsewhere by paying for it, noting that some may find the market rate too expensive and will drop out, what does that supply/demand curve look like?