I think a value $1,500.00 to $2,000.00 is extremely optimistic. There are currently a couple similar size machines on eBay with an asking price of $1,200.00. If you do a an advanced search there are a few that have sold in the $900.00 to $1,000.00 range. However the OP's assessment on the value of parts seems very close looking at what has sold in the last 12 months on eBay.
As a point of reference I was able to purchase a Sheldon MW-56-P (13"x56") machine in the Chicago area for only slightly more than the price mentioned by Moderatemixed. The machine I purchased machine had been rebuilt including grinding of the bed and cross slide ways. It also included 3 chucks, a collet drawbar system, a QCTP, steady rest, follow rest, several drill chucks and other assorted tooling.
View attachment 294616
View attachment 294617