Yes. Really.
No. Not some third party 'counts as'.
Actual GW models, from out of off their website. Its true. Check it.
Vostoryans. £20.50 for 10, including Heavy Bolter Team
[url]http://www.games-workshop.com/en-GB/Vostroyan-Firstborn-Squad[/url]
Steel Legion. £20.50 for 10, including Missile Launcher Team
[url]http://www.games-workshop.com/en-GB/Steel-Legion-Squad[/url]
Cadian or Catachan? £18.00 for 10, no heavy weapons. Those are £9.50 each.
£7 cheaper to buy the metal/finecast squad (not sure what they're made of).
Bit of an oddity I though I'd point out.
Though has to be said, each plastic HW kit can yield three weapons as is (tripod, Mortar, Missile Launcher), so kind of possible to make the plastics the better value.
But for those on a strict budget, who can't be too bothered with converting, observation stands!
Odd huh?