I don't buy everything OEM, but in my experience, the OEM plug wires really do last 60K plus miles with no problems. When I've used aftermarket wires, years and years ago, they always cracked, and wore out sooner. The OEM wires also seem to fit better.

It might be possible that modern day aftermarket wires "might" be just as good for a cheaper price, but I don't mind spending the extra money on wires that I don't have to worry about for a number of years after I put them on.

For more expensive parts like that, you might do a search for marked down Toyota parts on the net.