Geek: Repair, replace or casemod?

My Nokia 770 web tablet has a dead spot on the screen.  It needs repairing or it's a chore to use - which means a new screen.  Now, when-new the thing was a couple of hundred pounds, but since the 800 came out, the value of the 770 has plunged and they're on ebay for under £100.  I'd be amazed if a screen replacement out-of-warranty cost less than the replacement cost of the device.  The screens themselves are available for €119; once you add postage to that it's close to the replacement of the whole unit.  And I want to casemod this anyway into a Clockwork Confabulator.

So, sports fans, does yours truly:

1: Just casemod the existing device, accepting that it is an end-of-life skunkworks product and that I'll have to live with the dead spot.  By the time I actually finish the project it'll be more obsolete than a Palm 3 anyway...

2: Replace the screen (risking bricking the device) then casemod away?

3: Get a second unit from ebay, and casemod the new or old one as takes my fancy.

Brain in a jar!

After finding a perfect brain jar in Ikea ("I am Jack's Ikea brain jar" perhaps?) I couldn't resist:

( Mad science behind the cut )