They run like $160-200 here.
You would probably come out ahead even after shipping.
Some suppliers list a Pierburg pump for a few dollars less.

That pump outwardly looks exactly like the one in my 300E.
I got a 'made in Taiwan' replacement for $140 because I desperately needed it on a Sunday.

Works, but is much louder than the Bosch. Also had different diameter, so took a bit to get it mounted securely. In the end, I used closed-cell foam pipe insulation, which worked great.

Anyways, 'made in Taiwan' stuff must be cheap down there...

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1986 300E 5-Speed 240k mi.