I won't use sniping software on my pc, because:
- sometimes my pc reboots itself after an automatic windows update and I haven't manually rebooted it as it requested
- sometimes parts of the internet are unavailable to me, short lived hiccups
- my broadband pay as you go modem for some reason disconnects itself. I guess in theory my data allowance also could run out overnight whilst reloading some news sites or other sites that I am not looking at (whilst sleeping)
For the cost in pennies to snipe professionally it is worth it to me. All it takes is waking up one morning and seeing that your bid didnt get placed, and someone else got it for peanuts, is enough to make you cry! Not worth it (to me anyway)....