Apparently Amazon don't care too much about IPs, I heard some used TOR with success but I can't guarantee you it will work, I personally use a VPN without problem.
The Following User Says Thank You to Lheonard For This Useful Post:
You obviously haven't read Amazon Ghost or you wouldn't be asking about ip masking.
Don't do it. And don't lie to us and say you've read either book.... jeez. You get it free with trial pay.
Ip masking will get you flagged, with ebay and amazon. There is no way around arguing us out of the point you're trying to make. If you use ip masking software or a proxy or anything like it, you will be flagged.