I built sortgadget a long time ago in a galaxy far, far away. The site is pretty simple – it lets you browse Amazon cameras for sale. It has a couple of sliders to narrow down your purchase criteria and then in theory makes affiliate sales commission. In theory.
Only I never did anything with it, so now it’s for sale on flippa with a reserve of $1 for anyone who does actually want to spend the time iterating it to something useful can do so.