SSZ - the bottom box looks like a KRL7002, which would be 29" deep. Are you sure on the 24" deep? It makes a difference in the price...
KRL7002 boxes that are in great condition are a good deal, IMO, at $1600-$1850. Where great condition is no dents, minor scratches, all original drawer liners with no rips or tears, everything functions as it should, etc. Then you add the top box on top of that.
If it is mint, and it is a very desirable color combo for you, I would say $2500-$3000 is a good price. If you start getting much north of $3000, then you might want to wait a while and see if he comes down (I'm basing my price on a 29" deep box combo.)
Hope this helps.
KLars1