Hi Basically I was advertising my websense on google adwords but they have banned my account. I am now thinking of selling my site but will the new owner be ok to use google adwords on the site?? Thanks
Assuming you got banned because of landing page policies and they keep the site as is without any changes, they will have the same problem and will eventually get banned too. If they comply with policies, they should be OK but I'm pretty sure Google keeps a list of domains which violate their policies so it might not be so easy. In the long term, when all is sorted out, should be OK.
Normally domains are burned forever, but if someone buys it and informs Google about an owener change and shows them the pages in question were deleted or changed according to their advertising policies, there is a slim chance to get this domain removed from the blacklist....but no guarantee.