http://surfspullen.nl/ is a beaut website, which will have detail of the board you are after and about 60% of boards have photos (especially later models).
On the rhs of screen you will see an area with ZOEKEN (search)
1. Type in a keyword for what you want.
2. Change check dot to "Een board in het archief", which roughly translates to "check out the grouse boards" (as opposed to "2e hands Surfspullen" which tranlsates to "used dutch gear").
3. Click "zoeken" button and away you go!

You can narrow searches down to years, brands etc and search result will give you length, width, volume, sail range and sometimes reviews (which can be roughly deciphered on www.freetranslation.com and is good for a laugh!)
Another site is
mytrims.com which is in english. Not bad either.
Helps keep the seller honest with the actual age of the board they are trying to sell!!