There’s a reliable way to combat scalping in general. Start selling the item at a high price or in larger quantity and then cut the price whenever sales drop off.
Scalpers can only make money by scalping something when it is being sold below what the market is willing to pay for it in the quantity in which it is available.
On a non-economic note, I’d add that I don’t think I’d want to buy an easily-modified Linux computer system from some random person unless I planned to wipe it. How do you know that the thing hasn’t been rootkitted?