members only

I purchased the Pro version and i have to say, even though it lacks very important features like categories and ability to limit max auctions per page on the feed, it is amazing. To make my customers feel secure and to keep everything LEGAL i have restricted the auction feed to members only, and i require them to accept my TOS when making an account. This only works with your plugin if i make the feed page members only, but i need non members to be able to view that page, and be made to log in when attempting to buy something. I am able to restrict adding auctions to members only because they have to do that in the admin area, but there is no way to restrict people from buying items without a membership unless i make the auctions completely private. This is a problem because people should not have to be a member to see auctions, just to buy or sell them. Is there a way to make the single auction page members only, or to make it open in a members only popup instead of opening a new page?

http://ww.wp.xz.cn/plugins/ultimate-auction/