These look like 1.2x0.8m europallets stacked maybe as much as 0.5m high depending on the pallet.
That first one linked looks to be somewhere about £20 - £25 / cubic foot maybe a pound or two more because there's a high proportion of board ends so some volume will be lost to splitting.
The maximum length seems to be about 800mm. For the price I would hope to get more timber and not have it cut up. He also says the oak may be "character" grade. I'll be interested to see the final price, I could start saving for my Christmas bonus.
I would be surprised if there was 10 cuft of material and quite a bit may be seconds so £30 to£35 cuft. £330 will buy around 6 cuft of prime selected hardwood such as cherry, a bit more beec/ash and a bit less oak /maple, which is more than enough for a larger project such as a good sized chest of drawers
So sorry dont think its a good deal (and some of the other listings looked total carp)
I've had a pallet from this supplier before, about 16 months ago.
And still working through it for turning blanks, mine were more around 1.2m in general, all but a couple of shaky oak lengths have been great, had quite a good number of 3x2 tulip wood too. At time it was £295 and delivered next day at no extra.
When done with this pallet, I'd certainly go back for more.
Here's a pic of a large platter/bowl, containing about 25ft of the Tulip wood made for a wedding gift, couple of the 500x500mm blank glue up and the finished bowl.
The pint glass is only there as a scale size marker.