maybe......
But as it says, it is part finished, incomplete and has no bearings.
So add to that the cost of finishing ie my polisher can only do his 50 times tables, so 1 item is £50, 2 is £100 irrespective of what it is, so for this arm that needs brush finishing.
Add bearings and the sleve spacer and getting it all to fit. £50 every day of the week.
Add to that making the missing parts. £50?
Plus all of the ball aching leg work and running round and general faffing about and suddenly, buying one all done is starting to make alot of sense.