Those things are valuable to someone! Almost any pump can be revived with a "rebuild" kit and some elbow grease.
And those Welch belt pumps are tanks. I bet they might just need a new motor (<$150 from Grainger) and maybe new seals and/or a belt.
Considering anew one could cost $2k+, that's a great deal.
Put on ebay if you don't want them.