I have been a member of DotComBuilder for years and you just can't beat it. $99 for 450 or more websites and 25+ PHP scripts is a great deal.

They are not freeware or GPL scripts. It's obvious they have an inhouse programmer who is creating them because they are all in the same basic format with the same basic installation. I think that their auction script is a version of EveryAuction which is GPL, but it's very customized.

I really don't know what more you could want. I highly recommend them.