I am selling my upgraded Specna Arms.
I bought this years ago and had it upgraded immediately, but I've used it very little. I don't play much anyway, and the times I do, I play with GBB. Underneath the paintwork, everything is still as good as new!
Hop-up, nub, hop-up rubber, and barrel have been upgraded (don't ask me exactly what anymore, I have no idea)
If you are interested in making a starter pack out of it, I have bunches of stuff lying around that I'll give away for free :)