There are much cheaper clones of the DE10 available these days. For a little while fully assembled MiSTer's were available on AliExpress for around $150-$200 al

There are much cheaper clones of the DE10 available these days. For a little while fully assembled MiSTer's were available on AliExpress for around $150-$200 although it looks like maybe they dried up. There's also the SuperStation based on the MiSTer project for around $250 if you're patient.