Do we have a target $ figure in mind? Not wanting to spoil the cost of the present, but it might be useful to shoot for a specific $ amount rather than working towards an unknown target.
I appreciate that much of the cost question will be down to how many parts are donated, but I think it is worth considering.
It might also be worth having a parts list that people can commit to and tick off as we go. So we don't have everyone arrive at the party with potato salad

.
Thoughts?
BTW - I'm in.