This one falls to the bargain you can't miss type.
Today I bought a 13th c. Russian tear drop infantry shield from a local historical reenactor, for 30 euro - that would be 45 USD or something.
Its much sturdier than ours - being made from proper wood, and not plywood. It has real leather for straps and on the edges, overall I really can't complain in any way about design, material etc. Even the bolts holding the straps are not bought, but hammered out from pig iron.
Here you can see the two compared.