It looks like some of the blocks are free, as you stated, but the vast majority of blocks must be purchased. Is that correct?
The site needs a little more work.
In one area the word "Blocks" is used but in another it is spelled "Bloc".
I found one section of blocks (Bicycles & Motorcycles) where all the images were blurry.
The word Vehicle is misspelled.
It is not very clear how one registers with the site or isn't that necessary?
If one wants to leave a comment they are prompted for a User name and Password. How does one go about creating such information?
Many of the main headings use a plural spelling when it isn't necessary.
What is the source of the blocks? Who created them?
Honestly, I think the site might have some potential but it needs more work.
For the time being I would not be inclined to utilize your website.