Keep it and finish it

I get the impression you've had a lot of mates help you out with it and probably for free, shurly you owe it to them to complete the project? i could be wrong on that though!

If it's a cash issue put it away for a year or too then come back and get it finished

You'd really regret parting with such a top quality shell it would eat you up to see someone else buy it, finish it and milk the lime light.

Stash it away for a month or 2 and think about it after a break!