Not sure really,
Im gussin a ton or so, usually 2 small trailer fulls, soil can be loaded straight into the trailer,And I will help load up.
There might be nearer 1000+ blocks, I havent counted,there on 5 or so pallets.
they are the 3" HD blocks (aparently) They are used but in good cond.
There is also 2 pallets of new bricks (worth £100+)and plenty of large used flagstones.
Access to them can be gained 24hr,as there on a security site.