Hi chris187, welcome to the forums!
I'm sorry about your suspensions, in order to truly make any future accounts of yours bullet proof, you must find out the reason eBay has suspended you in the first place. Was it because the item you're selling? If that's the case with any future accounts you will be limited time wise. If another user has complained about your item and that's the reason for your suspension, it will happen again. So just be careful about that.
Using your brother's account will be okay. But be warned you risk the chance of linking that account and having it suspended as well. Be sure to read my eBay guide for steps on how to minimize linking accounts. guide | 
