There are a few markets in Fuerteventura and to be honest they are all the same. They mostly have the usual products, fake watches etc but there are some stalls that have some nice items, like cheap scarfs(whcih are high quality fabric) aloe vera products and a few other interesting things to see.
In Caleta the market is Saturday morning and you have to go up the hill a bit to find it. It's around a 15 min walk,just follow all the people or ask someone for directions. It would be near the bus stop which b
Here is a link to all the markets o the island: Link