@phil
We do not have any of those dual chip (NF2) miners, although we do have a couple of the similar six-chip NF6.
I think I have a few NF2s left around - they're considered "defective" as the asics underperformed significantly (and I haven't bother to unsolder them). Aside from that they work sufficiently fine for testing and experiments. If you want PM me your address and I can mail you one.
I also have some poor performers around, including some NF6's. PM me if you guys need some.