You'll definitely need to be able to change and use different IP address, if you continue to use the same one you will continue to be suspended fairly easy.
As for 'abusing eBay', it can be a number of different reasons why you get banned. It could be you're listing too fast within the first week or 30 days as grandmastr points out, and or your auctions descriptions and titles.
Questions: Do you use different auction descriptions and titles for your auctions each time you create an account, or do you use the same? If the same, then that could be an easy way to link your accounts as well.
Since you're becoming banned so fast within a short period of time, it seems like you're being linked by your ip address.
Read my guide, if you haven't already, it shows most ways eBay can catches you. eBay Suspension Guide | 
