That's all a bit different from the OP who seems to only accumulate.
I buy the odd bass and sell the odd bass also, only stuff I haven't had a go on and want to try. If a bargain comes up I jump on it and it's no trouble to offload without taking a loss.
The latest is pretty much 'the one'. It may stay or it may go. 'It's a bit heavy' is the only complaint, otherwise I seem to be covered.
A better upright would be nice if I was flush.
As for the OP, I would say the time to stop accumulating is long gone when a bunch only rate a mention in passing.