I have a complete Manfrotto boom assembly and Manfrotto 004 heavy-duty light stand for sale.
The boom includes the 8kg counterweight, and looks great.
The 004 stand is in slightly less perfect cosmetic condition.
Everything works smoothly and beautifully.
$180 plus shipping from Canada; I'll cover Paypal fees.
Due to the size and weight, this is restricted to Canada and US sales only; sorry to those overseas.