I don't know who Karup is, but he's certainly created a great amateur site. The site has been around since 1997 and it's one of the largest (if not THE largest) amateur and teen sites on the net! It's updated five times a week, with each update consisting of approximately 10 full photo sets or 6 full-length movies.
Over 20 different photographers shoot exclusive content for this site that you won't find anywhere else on the web.
The girls on Karup's Private Collection range from petite teenagers (18+) to their "older women" section and everything in between.
If you like amateurs, girls next door, teens etc, you will find there huge amount of high quality content!
I recommend you to join this great site! It's really worth it if you give it a try. You'll be very happy you did!