The way I see it - You have a great restoration project. The backglass is an issue - but one may pop up on eBay, or someone might have one. The MDB may set you back and if the boards are in fact damaged through corrosion, then it MAY get expensive.

Really depends on your patience - Do you want to wait for the glass ?

DON'T PART IT OUT - Before offering it as a complete machine here.